Cisco Systems OL-1911-05 manual Configuring as an ATM ARP Server, Minutes, 24-22

Chapter 24 Configuring ATM Router Module Interfaces

Configuring Classical IP over ATM in an SVC Environment

Configuring as an ATM ARP Server

Cisco’s implementation of the ATM ARP server supports a single, nonredundant server per LIS, and one ATM ARP server per subinterface. Thus, a single ATM switch router can support multiple ARP servers by using multiple interfaces.

To configure the ATM ARP server, perform the following steps, beginning in global configuration mode:

	Command	Purpose
Step 1
	Switch(config)# interface atm	Selects the Catalyst 8540 MSR enhanced ATM
	card/subcard/port[.subinterface#]	router module interface.
	Switch(config-if)#
Step 2
	Switch(config-if)# atm nsap-address	Specifies the NSAP ATM address of the interface.
	nsap-address	or
	or	Specifies the end-system-identifier address of the
	Switch(config-if)# atm esi-addressesi.selector	interface.
Step 3 Switch(config-if)# ip address ip-address mask		Specifies the IP address of the interface.
Step 4
	Switch(config-if)#atm arp-server time-out	Configures the ATM ARP server optional idle
	minutes1	timer.
Step 5	Switch(config-if)# atm route addr-prefix2atm	Configures a static route through the optional
	card/subcard/port internal	ATM router module interface.

1.This form of the atm arp-servercommand indicates that this interface performs the ATM ARP server functions. When you configure the ATM ARP client (described earlier), the atm arp-servercommand is used—with a different keyword and argument—to identify a different ATM ARP server to the client.

2.Address prefix is the first 19 bytes of the NSAP address.

Note The ESI address form is preferred in that it automatically handles the advertising of the address. Use the NSAP form of the command when you need to define a full 20-byte unique address with a prefix unrelated to the network prefix on that interface. You only need to specify a static route when configuring an ARP server using an 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 timeout the entry.

Example

The following example configures the route processor interface ATM 0 as an ARP server (shown in Figure 24-7):

ARP_Server(config)# interface atm 1/0/0

ARP_Server(config-if)#atm esi-address 0041.0b0a.1081.00

ARP_Server(config-if)# atm arp-server self

ARP_Server(config-if)#ip address 123.233.45.2 255.255.255.0

	ATM and Layer 3 Switch Router Software Configuration Guide
24-22	OL-1911-05