Configuring an ATM Network

This chapter walks you through configuration of a typical Asynchronous Transfer Mode (ATM) network after autoconfiguration has established the default network connections described in the chapter "Configuring the LightStream 1010 ATM Switch."

The network configuration modifications described in this chapter are used to optimize your ATM network operation. Because the LightStream 1010 offers true plug-and-play operation, most users may not need to perform any of these procedures. In some cases however, the autoconfiguration of interfaces may not maximize the potential of the LightStream 1010 features.

For a complete description of LightStream 1010 ATM switch configuration examples see the Light Stream 1010 ATM Switch Software Configuration Guide publication. The LightStream 1010 ATM Switch Command Reference publication provides the complete syntax for every switch configuration command and describes the no form of each command.

Note The no command is used to undo a previously executed command. For example, no shutdown will bring the switch back on line after executing the shutdown command.

Table 7-1 list the types of supported virtual connections.

Table 7-1 : Supported LightStream 1010 Virtual Connection Types

Connection Point-to-
Point Point-to-
Multipoint Transit Terminate

Permanent virtual channel link (PVCL) 3 3 -- --

Permanent virtual path link (PVPL) 3 3 -- --

Permanent virtual channel connection (PVCC) 3 3 3 3

Permanent virtual path connection (PVPC) 3 3 3 --

Soft permanent virtual channel connection (Soft PVCC) 3 -- 3 --

Soft permanent virtual path connection (Soft PVPC) 3 -- 3 --

Switched virtual channel connection (SVCC) 3 3 3 3

Switched virtual path connection (SVPC) 3 3 3 --

Connection	Point-to- Point	Point-to- Multipoint	Transit	Terminate
Permanent virtual channel link (PVCL)	3	3	--	--
Permanent virtual path link (PVPL)	3	3	--	--
Permanent virtual channel connection (PVCC)	3	3	3	3
Permanent virtual path connection (PVPC)	3	3	3	--
Soft permanent virtual channel connection (Soft PVCC)	3	--	3	--
Soft permanent virtual path connection (Soft PVPC)	3	--	3	--
Switched virtual channel connection (SVCC)	3	3	3	3
Switched virtual path connection (SVPC)	3	3	3	--

Note For a complete description of the commands in this chapter, refer to the LightStream 1010 ATM Switch Command Reference document.

Description of Example Network

The example network shown in Figure 7-1 will be used to describe some standard ATM configuration tasks you might want to perform after completing the tasks described in the chapter "Configuring the LightStream 1010 ATM Switch."

Figure 7-1 : Example Network Configuration

The network configuration shown in Figure 7-1 is an example of a corporate campus ATM backbone network connecting three buildings with an ATM connection across the wide area network (WAN) to a remote sales office.

The following configuration examples describe a part of the network configuration shown in Figure 7-1:

Example Format

The configuration examples in this chapter will use the following format:

Description of the network connection to be modified
Rationale for modification
Task list describing the task and the commands used. See the Light Stream 1010 ATM Switch Software Configuration Guide for additional task tables used to modify and monitor the switch.
Description of syntax used with the command. See the Light Stream 1010 ATM Switch Software Command Reference publication for a complete description of all commands used to modify and monitor the switch.
Example of command(s) used to modify initial configuration
Description and example of the commands used to confirm modification

Configuring a PVC Example

This section describes configuring a connection from switch LS1010-1(HB-1) in the headquarters building, through the public WAN to switch LS1010(SB-1) in the remote sales office as a PVC. See Figure 7-2 for a detail of the example network being configured.

Figure 7-2 : PVC Connection Example

atm pvc Command Description

To configure a PVC for the network management connection on switch LS1010-1(HB-1) in the headquarters building, use the following EXEC commands using the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal configure¹
[terminal]

Configure the connection-traffic-table-row instead of using a default. This is an optional command atm connection-traffic-table-row [index row-index] cbr peak-cell-rate rate [tolerance cell-count]²

Select the interface to be configured interface atm card/sub_card/port [.vpt #]

Configure PVC interface atm pvc vpi vci [cast-type type] [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card/sub_card/port [.vpt #] vpi vci

¹ This command is documented in the LightStream 1010 ATM Switch Command Reference publication.
² Connection-traffic-table-row is explained in the LightStream 1010 ATM Switch Software Configuration Guide publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal	configure¹ [terminal]
Configure the connection-traffic-table-row instead of using a default. This is an optional command	atm connection-traffic-table-row [index row-index] cbr peak-cell-rate rate [tolerance cell-count]²
Select the interface to be configured	interface atm card/sub_card/port [.vpt #]
Configure PVC interface	atm pvc vpi vci [cast-type type] [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card/sub_card/port [.vpt #] vpi vci

Syntax Description

vpi---The ATM network virtual path identifier (VPI) to use for this virtual channel (VC) in the range of 0 through 255

vci---The ATM network virtual channel identifier (VCI) to use for this VC in the range of 0 through 65,535

cast-type---p2p | p2mp-root | p2mp-leaf (default = p2p)

upc---User parameter control pass | tag | drop (default = pass)

pd---Packet discard on | off (default = on)

rx-cttr (connection-traffic-table-row index)---should be configured before using this command

tx-cttr (connection-traffic-table-row index)---should be configured before using this command

Note The row index for rx-cttr and tx-cttr must be configured before using this optional parameter. See the atm connection-traffic-table-row command in the LightStream 1010 ATM Switch Command Reference publication for a detailed description.

Example

The following example configures a PVC on switch LS1010-1(HB-1) located in the headquarters building at interface 0/1/0, VPI=50, VCI = 100, and ATM interface 0/1/0
VPI = 100, VCI = 200:

LS1010-1(HB-1)(config)# interface atm 0/1/0
LS1010-1(HB-1)(config-if)# atm pvc 50 100 interface atm 0/1/0 100 200

show vc Example

To show the interface configuration, use the following commands:

Task Command

Show the ATM interface configuration show atm vc
or
show atm vc card/sub_card/port [.vpt #] vpi vci

Task	Command
Show the ATM interface configuration	show atm vc or show atm vc card/sub_card/port [.vpt #] vpi vci

Examples

The following example displays the switch LS1010-1(HB-1) located in the headquarters building at the virtul configuration:

LS1010-1(HB-1)#show atm vc
Interface    VPI     VCI     Type   X-Interface  X-VPI   X-VCI   Status
ATM0/0/0     0       5        PVC     ATM2/0/0     0       32      UP
ATM0/0/0     0       16       PVC     ATM2/0/0     0       33      UP
ATM0/0/0     0       18       PVC     ATM2/0/0     0       34      UP
ATM0/0/0.99  99      3        PVC     ATM2/0/0     0       83      UP
ATM0/0/0.99  99      4        PVC     ATM2/0/0     0       84      UP
ATM0/0/0.99  99      5        PVC     ATM2/0/0     0       80      UP
ATM0/0/0.99  99      16       PVC     ATM2/0/0     0       81      UP
ATM0/0/0.99  99      18       PVC     ATM2/0/0     0       82      UP
ATM0/0/1     0       5        PVC     ATM2/0/0     0       35      UP
ATM0/0/1     0       16       PVC     ATM2/0/0     0       36      UP
ATM0/0/1     0       18       PVC     ATM2/0/0     0       37      UP
ATM0/0/2     0       5        PVC     ATM2/0/0     0       38      UP
ATM0/0/2     0       16       PVC     ATM2/0/0     0       39      UP
ATM0/0/2     0       18       PVC     ATM2/0/0     0       40      UP
ATM0/0/3     0       5        PVC     ATM2/0/0     0       41      UP
ATM0/0/3     0       16       PVC     ATM2/0/0     0       42      UP
ATM0/0/3     0       18       PVC     ATM2/0/0     0       43      UP
LS1010(SB-1)#

The following example displays the switch LS1010-1(HB-1) located in the headquarters building at the virtual configuration on interface 0/1/0:

LS1010(SB-1)#show atm vc interface atm 0/1/0
Interface    VPI     VCI     Type   X-Interface  X-VPI   X-VCI   Status
ATM0/1/0     0       5        PVC     ATM2/0/0     0       44      UP
ATM0/1/0     0       16       PVC     ATM2/0/0     0       45      UP
ATM0/1/0     0       18       PVC     ATM2/0/0     0       46      UP
LS1010(SB-1)#

The following example displays switch LS1010-1(HB-1) located in the headquarters building at the virtual configuration on interface 0/1/0, VPI = 50, VCI = 100:

LS1010-1(HB-1)#show atm vc interface atm 0/1/0 50 100
Interface: ATM0/1/0, Type: oc3suni
VPI = 50  VCI = 100
Status: UP
Last-status-change-time:00:00:34
Connection-type: PVC
Cast-type: point-to-point
Packet-discard-option: enabled
Usage-Parameter-Control (UPC): pass
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Cross-connect-interface: ATM0/1/0, Type: oc3suni
Cross-connect-VPI = 100
Cross-connect-VCI = 200
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
Rx cells: 0, Tx cells: 0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 0
Rx scr-clp01: none
Rx tolerance: none
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 0
Tx scr-clp01: none
Tx tolerance: none
LS1010-1(HB-1)#

Configuring a Public Network VP Tunnel Example

This section describes configuring the DS-3 public User-Network Interface (UNI) ATM connection from the headquarters building across the WAN to the remote sales office as a VP tunnel. See Figure 7-3 for a detail of the example network being configured.

Figure 7-3 : Public VP Tunnel Network Example

Rationale

Public DS-3 carriers require VPs across their networks. To support signaling across the public network between switch LS1010-1(HB-1) in the headquarters building and the remote sales office switch LS1010(SB-1) a VP tunnel must be configured.

Following is the task list and an example of the commands used to configure the public DS-3 UNI connections in the example:

atm pvp and VP Tunnel Command Description

To configure a VP tunnel connection use the following EXEC commands using the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal configure¹
[terminal]

Configure the connection-traffic-table-row index atm connection-traffic-table-row [index row-index] cbr peak-cell-rate rate [tolerance cell-count]

Select the physical interface to be configured. interface atm card/sub_card/port[.vpt #]

Configure interface PVP atm pvp vpi [cast-type type] [upc upc] [rx-cttr index] [tx-cttr index]

Change to configuration mode. exit

Create a VP tunnel interface atm card/sub_card/port.vpt #

¹ This command is documented in the LightStream 1010 ATM Switch Command Reference publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal	configure¹ [terminal]
Configure the connection-traffic-table-row index	atm connection-traffic-table-row [index row-index] cbr peak-cell-rate rate [tolerance cell-count]
Select the physical interface to be configured.	interface atm card/sub_card/port[.vpt #]
Configure interface PVP	atm pvp vpi [cast-type type] [upc upc] [rx-cttr index] [tx-cttr index]
Change to configuration mode.	exit
Create a VP tunnel	interface atm card/sub_card/port.vpt #

Syntax Descriptions

vpi---The ATM network VPI to use for this VP in the range of 1 through 255

cast-type ---p2p | p2mp-root | p2mp-leaf (default = p2p)

upc---pass | tag | drop (default = pass)

rx-cttr (connection-traffic-table-row index)---should be configured before using this command

tx-cttr (connection-traffic-table-row index)---should be configured before using this command

Note To create a VP tunnel the vpi number and vpt number must be the same.

Examples

The following examples configure the ATM VP tunnel on the switch LS1010-1 (HB-1) located in the headquarters building at interface 1/0/0, VPI 99 to switch LS1010 (SB-1) located in the remote sales office at interface 4/0/0, VPI 99:

LS1010-1(HB-1)(config)#interface atm 1/0/0
LS1010-1(HB-1)(config-if)#atm pvp 99
LS1010-1(HB-1)(config-if)#interface atm 1/0/0.99

LS1010(SB-1)(config)#interface atm 4/0/0
LS1010(SB-1)(config-if)#atm pvp 99
LS1010(SB-1)(config-if)#exit
LS1010(SB-1)(config)#interface atm 4/0/0.99

Using show atm interface to Display Virtual Path Tunnel

To show the ATM virtual interface configuration use the following commands:

Task Command

Show the ATM interface configuration. show atm interface atm card/sub_card/port [.sub_inter #]

Task	Command
Show the ATM interface configuration.	show atm interface atm card/sub_card/port [.sub_inter #]

Example

The following example displays the configuration of the switch LS1010-1(HB-1) located in the headquarters building at subinterface 1/0/0.99:

LS1010-1(HB-1)(config)#show atm interface atm 1/0/0.99
Interface:      ATM1/0/0.99     Port-type:    vp tunnel
IF Status:      UP              Admin Status: up
Auto-config:    disabled        AutoCfgState: not applicable
IF-Side:        Network         IF-type:      UNI
Uni-type:       Private         Uni-version:  V3.0
Max-VPI-bits:   8               Max-VCI-bits: 14
Max-VP:         0               Max-VC:       32768
ATM Address for Soft VC: 47.0091.8100.0000.0060.3e5a.db01.4000.0c80.0000.63
Configured virtual links:
  PVCLs SoftVCLs   SVCLs  Total-Cfgd  Installed-Conns
      5        0       0           5                5
Input cells: 0, Output cells: 0 
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 134028000 bits/sec, 2528830 cells/sec
LS1010-1(HB-1)(config)#

Configuring an IISP Example

This section describes configuring the Interim Interswitch Signaling Protocol (IISP) connection from switch LS1010 (SB-1) in the remote sales office building to the switch LS1010 (SB-1) in the same building. See Figure 7-4 for an example of this type of network configuration.

Figure 7-4 : IISP Network Segment Example

Rationale

The LightStream 100 ATM switch does not support the PNNI protocol and requires that the connection between the switches be manually configured as IISP.

Following are the task list and an example of the commands used to configure the connections in the example:

atm iisp Command Description

To configure an IISP connection on an interface, use the following EXEC commands using the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal configure¹
[terminal]

Select the interface to be configured interface atm card/sub_card/port[.sub_inter #]

Disable the interface shutdown

Disable autolink determination no atm auto-configuration

Configure IISP on the interface atm iisp side {user | network}

Reenable the interface no shutdown

Configure the ATM route address prefix atm route prefix atm-address-prefix

Exit interface configuration mode exit

Exit configuration mode exit

¹ This command is documented in the LightStream 1010 ATM Switch Command Reference publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal	configure¹ [terminal]
Select the interface to be configured	interface atm card/sub_card/port[.sub_inter #]
Disable the interface	shutdown
Disable autolink determination	no atm auto-configuration
Configure IISP on the interface	atm iisp side {user \| network}
Reenable the interface	no shutdown
Configure the ATM route address prefix	atm route prefix atm-address-prefix
Exit interface configuration mode	exit
Exit configuration mode	exit

Syntax Description

side = specify if this is a user or network side connection.

atm-address-prefix---13 bytes of ATM address including 3-byte Cisco International Code Designator (ICD), 4 bytes assigned by Cisco, 6-byte Media Access Control (MAC) address.

Example

The following example configures switch LS1010(SB-1) located in the remote sales building at interface 3/0/0 with no autodetermination as IISP, side = user, and sets the ATM route address prefix = 47.0091.8100.0000.0000.0ca7.ce01:

LS1010(SB-1)(config)#interface atm 3/0/0
LS1010(SB-1)(config-if)#shutdown
LS1010(SB-1)(config-if)#no atm auto-configuration
LS1010(SB-1)(config-if)#atm iisp side user
LS1010(SB-1)(config-if)#no shutdown
LS1010(SB-1)(config)# atm route prefix 47.0091.8100.0000.0000.0ca7.ce01
LS1010(SB-1)(config-if)#exit
LS1010(SB-1)(config)#exit
LS1010(SB-1)#

show running-config Example

To show the interface configuration use the following command:

Task Command

Show the interface show running-config

Task	Command
Show the interface	show running-config

Example

The following example displays the configuration of the switch LS1010(SB-1) located in the remote sales building at interface 3/0/0.100:

LS1010(SB-1)#show running-config
Building configuration...

Current configuration:
!
version 11.1
no service pad
service udp-small-servers
service tcp-small-servers
!
hostname LS1010-1(HB-1)
!
boot system flash slot0:rhino/ls1010-wi-m_1.083.bin.Z
!
atm over-subscription-factor 16
atm service-category-limit cbr 3000
atm qos uni3-default  cbr max-cell-loss-ratio 12
atm address 47.0091.8100.0000.0060.3e5a.db01.0060.3e5a.db01.00
!
interface ATM0/0/0
 no keepalive
 no atm auto-configuration
 no atm ilmi-enable
 no atm ilmi-lecs-implied
 atm iisp side user
 atm pvp 99

<Information Deleted>

end
LS1010(SB-1)#

Configuring Classical IP Over ATM

This section describes configuring a port on switch LS1010-1(HB-1) in the headquarters building to allow a classical IP-over-ATM connection to the switch CPU.

The following sections describe configuring the LightStream 1010 ATM switch in either an SVC or PVC environment:

Configure Classical IP over ATM in a SVC Environment

This section describes classical IP over ATM in an SVC environment. It requires a network administrator to configure only the device's own ATM address and that of a single ATM ARP server into each client device.

Figure 7-5 describes the steps needed to set up a classical IP over ATM connection between LightStream 1010 ATM switch client A and client B.

Figure 7-5 : Example of Classical IP Over ATM Connection Setup

Step 1 The initial IP packet sent by client A triggers a request to the ARP server to look up the IP address and the corresponding ATM address of client B in the ARP server ARP table.

Step 2 The ARP server sends back a response to client A with the matching ATM address.

Step 3 Client A uses the ATM address it just obtained from the ARP server to setup an SVC directly to Client B.

Step 4 When client B replies with an IP packet to client A, it also triggers a query to the ARP server.

Note When client B receives the ATM address for client A, it usually discovers it already has a call set up to client A's ATM address and will not set up another call.

Step 5 Once the connection is known to both clients, they communicate directly over the SVC.

In Cisco's implementation, the ATM ARP client tries to maintain a connection to the ATM ARP server. The ATM ARP server can tear down the connection, but the client attempts once each minute to bring the connection back up. No error messages are generated for a failed connection, but the client will not route packets until the ATM ARP server is connected and translates IP network addresses.

For each packet with an unknown IP address, the client sends an ATM ARP request to the ARP server. Until that address is resolved, any IP packet routed to the ATM interface will cause the client to send another ATM ARP request.

The LightStream 1010 ATM switch may be configured as an ATM ARP client to work with any ATM ARP server conforming to RFC 1577. Alternatively, one of the LightStream 1010 ATM switches in a logical IP subnet (LIS) may be configured to act as the ATM ARP server itself. In that case, it automatically acts as a client as well. To configure classical IP and ARP in an SVC environment, perform one of the following tasks:

Configure as an ATM ARP Client

In an SVC environment, configure the ATM ARP mechanism on the interface by performing the following tasks starting in global configuration mode.

Task	Command
Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal.	configure¹ [terminal]
Step 2 Select the interface to be configured.	interface atm 2/0/0[.sub_inter #]
Step 3 Specify the NSAP ATM address of the interface or Specify the end-system-identifier address of the interface.	atm nsap-address nsap-address atm esi-address esi-address
Step 4 Specify the IP address of the interface.	ip address address mask
Step 5 Specify the ATM address of the ATM ARP server.	atm arp-server nsap nsap-address
Step 6 Exit interface configuration mode.	exit
Step 7 Configure a static route through the switch to the CPU interface. See the following note.	atm route {addr-prefix²} atm 2/0/0 internal

Note You only need to specify a static route in Step 7 when configuring an ARP client using NSAP address.

Using NSAP Address Example

The following example configures CPU interface 2/0/0 of client A, in Figure 7-5, as the following:

ATM ARP client with NSAP address---47.0091.8100.0000.1111.1111.1111.1111.1111.1111.00
IP address---123.322.45.1
subnet mask---255.255.255.0
ARP server NSAP address---47.0091.8100.0000.1111.1111.1111.2222.2222.2222.00
internal static route configured with NSAP address---47.0091.8100.0000.1111.1111.1111.1111.1111.1111.00---to ATM interface 2/0/0

LS1010-1(HB-1)(config)#interface atm 2/0/0
LS1010-1(HB-1)(config-if)#$dress 47.0091.8100.0000.1111.1111.1111.1111.1111.1111.00
LS1010-1(HB-1)(config-if)#ip address 123.233.45.1 255.255.255.0
LS1010-1(HB-1)(config-if)#$dress 47.0091.8100.0000.1111.1111.1111.2222.2222.2222.00
LS1010-1(HB-1)(config-if)#exit
LS1010-1(HB-1)(config)#$0.0000.1111.1111.1111.1111.1111.1111 atm 2/0/0 internal

Note In the previous example some of the commands extended beyond the single line of the screen and the command line shifted ten spaces to the left. The dollar sign ($) indicates the command line has shifted.

Using ESI Example

The following example configures CPU interface 2/0/0 of client A, in Figure 7-5, as the following:

ATM ARP client with end system identifier---0041.0b0a.1081.40
IP address---123.233.45.1
subnet mask---255.255.255.0,
ARP server NSAP address---47.0091.8100.0000.1111.1111.1111.2222.2222.2222.00

LS1010-1(HB-1)(config)#interface atm 2/0/0
LS1010-1(HB-1)(config-if)#atm esi-address 0041.0b0a.1081.40
LS1010-1(HB-1)(config-if)#ip address 123.233.45.1 255.255.255.0
LS1010-1(HB-1)(config-if)#$7.0091.8100.0000.1111.1111.1111.2222.2222.2222.00
LS1010-1(HB-1)(config-if)#exit
LS1010-1(HB-1)(config)#

Note In the previous example one command extended beyond the single line of the screen and the command line shifted ten spaces to the left. The dollar sign ($) indicates the command line has shifted.

Configure as an ATM ARP Server

Cisco's implementation of the ATM ARP server supports a single, nonredundant server per logical IP subnetwork (LIS) and supports one ATM ARP server per subinterface. Thus, a single LightStream 1010 ATM switch can support multiple ARP servers by using multiple interfaces.

To configure the ATM ARP server, complete the following tasks starting in global configuration mode:

Task Command

Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal. configure¹
[terminal]

Step 2 Select the interface to be configured. interface atm 2/0/0[.sub_inter #]

Step 3 Specify the NSAP ATM address of the interface
or
Specify the end-system-identifier address of the interface. atm nsap-address nsap-address

atm esi-address esi-address

Step 4 Specify the ATM address of the ATM ARP server. atm arp-server self

Step 5 Specify the IP address of the interface. ip address address mask

Step 6 Configure the ATM ARP server optional idle timer. atm arp-server time-out minutes²

Step 7 Exit interface configuration mode. exit

Step 8 Configure a static route through the switch to the CPU interface.
See the following note. atm route {addr-prefix³} atm 2/0/0 internal

¹ This command is documented in the LightStream 1010 ATM Switch Command Reference publication.
² When you use this form of the atm arp-server command, it indicates that this interface will perform the ATM ARP server functions. When you configure the ATM ARP client (as described earlier), the atm arp-server command is usedwith a different keyword and argumentto identify a different ATM ARP server to the client.
³ First 19-bytes of NSAP address

Task	Command
Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal.	configure¹ [terminal]
Step 2 Select the interface to be configured.	interface atm 2/0/0[.sub_inter #]
Step 3 Specify the NSAP ATM address of the interface or Specify the end-system-identifier address of the interface.	atm nsap-address nsap-address atm esi-address esi-address
Step 4 Specify the ATM address of the ATM ARP server.	atm arp-server self
Step 5 Specify the IP address of the interface.	ip address address mask
Step 6 Configure the ATM ARP server optional idle timer.	atm arp-server time-out minutes²
Step 7 Exit interface configuration mode.	exit
Step 8 Configure a static route through the switch to the CPU interface. See the following note.	atm route {addr-prefix³} atm 2/0/0 internal

You can designate the current LightStream 1010 ATM switch as the ATM ARP server in Step 6 by adding the keyword self.

Note You only need to specify a static route in Step 7 when configuring an ARP client using NSAP address.

The idle timer interval is the number of minutes a destination entry listed in the ATM ARP server's ARP table can be idle before the server takes any action to time out the entry.

Example

The following example configures CPU interface 2/0/0 of the ARP server, in Figure 7-5, as the following:

ATM ARP client with end system identifier---0041.0b0a.1081.40
IP address---123.233.45.2
subnet mask---255.255.255.0

LS1010-1(HB-1)(config)#interface atm 2/0/0
LS1010-1(HB-1)(config-if)#atm esi-address 0041.0b0a.1081.40
LS1010-1(HB-1)(config-if)#atm arp-server self
LS1010-1(HB-1)(config-if)#ip address 123.233.45.2 255.255.255.0
LS1010-1(HB-1)(config-if)#exit

show arp Command Example

To show the IP over ATM interface configuration, use the following command:

Task Command

Show the ATM interface ARP configuration. show atm arp

Show the ATM map list configuration. show atm map

Task	Command
Show the ATM interface ARP configuration.	show atm arp
Show the ATM map list configuration.	show atm map

Example

In the following example the show atm arp command displays the configuration of switch LS1010(HB-1) located in the headquarters building at interface 2/0/0:

LS1010-1(HB-1)#show atm arp

Note that a '*' next to an IP address indicates an active call

      IP Address        TTL     ATM Address
ATM2/0/0:
    * 10.0.0.5          19:21   4700918100567000000000112200410b0a108140

LS1010-1(HB-1)#

The following example displays the map-list configuration of the switch static map and IP over ATM interfaces:

LS1010-1(HB-1)#show atm map
Map list ATM2/0/0_ATM_ARP : DYNAMIC
arp maps to NSAP 36.0091810000000003D5607900.0003D5607900.00
        , connection up, VPI=0 VCI=73, ATM2/0/0
ip 5.1.1.98 maps to NSAP 36.0091810000000003D5607900.0003D5607900.00
        , broadcast, connection up, VPI=0 VCI=77, ATM2/0/0

Map list ip : PERMANENT
ip 5.1.1.99 maps to VPI=0 VCI=200

LS1010-1(HB-1)#

Configure Classical IP over ATM in a PVC Environment

This section describes classical IP over ATM in a PVC environment. The ATM Inverse ARP mechanism is applicable to networks that use PVCs, where connections are established but the network addresses of the remote ends are not known. A server function is not used in this mode of operation.

In a PVC environment, configure the ATM Inverse ARP mechanism by performing the following tasks, starting in global configuration mode:

Task Command

Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal. configure¹
[terminal]

Step 2 Select the interface to be configured. interface atm 2/0/0

Step 3 Specify the IP address of the interface. ip address address mask

Step 4 Create a PVC and enable Inverse ARP on it. atm pvc vpi vci encap aal5snap [inarp minutes]

¹ This command is documented in the LightStream 1010 ATM Switch Command Reference publication.

Task	Command
Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal.	configure¹ [terminal]
Step 2 Select the interface to be configured.	interface atm 2/0/0
Step 3 Specify the IP address of the interface.	ip address address mask
Step 4 Create a PVC and enable Inverse ARP on it.	atm pvc vpi vci encap aal5snap [inarp minutes]

Repeat Step 4 for each PVC you want to create.

The inarp minutes interval specifies how often Inverse ARP datagrams are sent on this virtual circuit. The default value is 15 minutes.

Note The ATM ARP and Inverse ATM ARP mechanisms work with IP only. All other protocols require map-list command entries to operate.

Example

The following example configures CPU interface 2/0/0 to use IP over ATM encapsulation as follows:

IP address---11.11.11.11
to ATM PVC---VPI=0 VCI=100
AAL5SNAP encapsulation
inverse ARP set to ten minutes
to ATM interface 0/0/0 VPI=50 VCI=100

Switch(config)#interface atm 2/0/0
Switch(config)#ip address 11.11.11.11
Switch(config-if)#atm pvc 0 100 encap aal5snap inarp 10 interface atm 0/0/0 50 100

show arp Command Example

To show the IP over ATM interface configuration use the following command:

Task Command

Show the ATM interface ARP configuration. show atm map

Task	Command
Show the ATM interface ARP configuration.	show atm map

Example

The following example displays the map-list configuration of the switch static map and IP over ATM interfaces:

LS1010-1(HB-1)#show atm map
Map list yyy : PERMANENT
ip 1.1.1.2 maps to VPI=0 VCI=200

Map list zzz : PERMANENT

Map list a : PERMANENT

Map list 1 : PERMANENT

Map list ATM2/0/0_ATM_ARP : DYNAMIC
arp maps to NSAP 47.009181005670000000001122.00410B0A1081.40
        , connection up, VPI=0 VCI=85, ATM2/0/0
ip 10.0.0.5 maps to NSAP 47.009181005670000000001122.00410B0A1081.40
        , broadcast, ATM2/0/0

LS1010-1(HB-1)#

Configuring LAN Emulation Client Example

This section describes configuring a LANE client connection from the switch LS1010-1(HB-1) in the headquarters building to the CPU port 2/0/0 of the switch.

Note This connection may be used for switch management only.

Rationale

Interface 2/0/0 configured as a LANE client will allow configuration of the switch from a remote host.

Using the atm lane client ethernet Command Description

To configure the interface 2/0/0 as a LANE client on switch LS1010-1(HB-1), use the following EXEC commands using the no form of these commands to disable.

Task Command

Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal configure¹
[terminal]

Step 2 Specify the address to the LANE Configuration Server (LECS) atm lecs-address lecs-address

Step 3 Select the interface to be configured. interface atm 2/0/0[.sub_inter #]

Step 4 Specify an ATM address, and override the automatic ATM address assignment for the LANE client lane client-atm-address atm-address-template

Step 5 Configure activate a LANE client on the specified subinterface lane client ethernet [elan-name]

¹ This command is documented in the LightStream 1010 ATM Switch Command Reference publication.

Task	Command
Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal	configure¹ [terminal]
Step 2 Specify the address to the LANE Configuration Server (LECS)	atm lecs-address lecs-address
Step 3 Select the interface to be configured.	interface atm 2/0/0[.sub_inter #]
Step 4 Specify an ATM address, and override the automatic ATM address assignment for the LANE client	lane client-atm-address atm-address-template
Step 5 Configure activate a LANE client on the specified subinterface	lane client ethernet [elan-name]

Syntax Description

lecs-address---LAN Emulation configuration server address

elan-name (Optional)---Name of the emulated LAN. Maximum length is 32 characters

atm-address-template---ATM address or a template in which wildcard characters are replaced by any nibble or group of nibbles of the prefix bytes, the end system identifier (ESI) bytes, or the selector byte of the automatically assigned ATM address.

Example

The following example configures the LAN Emulation configuration server address to the client on switch LS1010-1(HB-1) located in the headquarters building at interface 2/0/0 client ATM ad dress = .0800.200C.1001.**, as a client Ethernet connection, name = mis.

LS1010-1(HB-1)(config)# atm lecs-address 47.0091.0000.0000.0000.0000.0000.0000.00
LS1010-1(HB-1)(config)# interface atm 2/0/0
LS1010-1(HB-1)(config-if)# lane client-atm-address...0800.200C.1001.**
LS1010-1(HB-1)(config-if)# lane client ethernet mis

show lane Example

To show the interface configuration use the following command:

Task Command

Show the LANE client configuration. show lane client

Task	Command
Show the LANE client configuration.	show lane client

Example

The following example displays the LANE configuration of switch LS1010-1(HB-1) located in the headquarters building at interface 2/0/0:

LS1010-1(HB-1)#show lane client   
LE Client ATM2/0/0  ELAN name: mis Admin: up  State: operational
Client ID: 2              
HW Address: 0061.3e5b.bb02   Type: ethernet             Max Frame Size: 1516
ATM Address: 47.00918100000000613E5BBB01.000011112222.00
 
 VCD  rxFrames  txFrames  Type       ATM Address
   0         0         0  configure  47.333300000000000000000000.000111222333.00
 104         1        11  direct     47.333300000000000000000000.001122334455.00
 105        15         0  distribute 47.333300000000000000000000.001122334455.00
 106         0        10  send       47.333300000000000000000000.000000111111.00
 107        19         0  forward    47.333300000000000000000000.000000111111.00
 108         5         6  data       47.00918100000000613E5BBB01.00000C523BC8.00

LS1010-1(HB-1)#

Conclusions

ATM network operations are optimized using software configuration modifications beyond the default network configuration. This chapter provides a small sample of the many configuration optimization commands available. The LightStream 1010 ATM Switch Software Configuration Guide lists the detailed tasks needed to configure and maintain your LS1010-1(HB-1). The LightStream 1010 ATM Switch Command Reference provides the complete syntax for every switch configuration command, and describes the no form of each command.

Table of Contents

Syntax Description

Example

Examples

Rationale

Syntax Descriptions

Examples

Example

Rationale

Syntax Description

Example

Example

Using NSAP Address Example

Using ESI Example

Example

Example

Example

Example

Rationale

Syntax Description

Example

Example