Cisco Systems OL-1911-05 manual Configuring as an ATM ARP Client, Nsap-address, 24-20

Chapter 24 Configuring ATM Router Module Interfaces

Configuring Classical IP over ATM in an SVC Environment

For a detailed description of the role and operation of the ATM ARP server, refer to the Guide to ATM Technology.

The ATM switch router can be configured as an ATM ARP client, thereby being able to work with any ATM ARP server conforming to RFC 1577. Alternatively, one of the ATM switch routers in a logical IP subnet (LIS) can be configured to act as the ATM ARP server itself. In that case, it automatically acts as a client as well. The following sections describe configuring the ATM switch router in an SVC environment as either an ATM ARP client or an ATM ARP server.

Configuring as an ATM ARP Client

In an SVC environment, configure the ATM ARP mechanism on the interface by performing the following steps, beginning in global configuration mode:

	Command	Purpose
Step 1
	Switch(config)# interface atm card/subcard/port	Selects the ATM router module interface.
	Switch(config-if)#
Step 2
	Switch(config-if)# atm nsap-address	Specifies the network service access point
	nsap-address	(NSAP) ATM address of the interface.
	or	or
	Switch(config-if)# atm esi-addressesi.selector	Specifies the end-system-identifier (ESI) address
		of the 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 nsap	Specifies the ATM address of the ATM ARP
	nsap-address	server.
Step 5
	Switch(config-if)# exit	Exits interface configuration mode.
	Switch(config)#
Step 6 Switch(config)# atm route addr-prefix1atm		Configures a static route through the ATM router
	card/subcard/port internal	module interface. See the note that follows this
		table.

1.The address prefix is the first 19 bytes of the NSAP address.

Note The end system identifier (ESI) address form is preferred, in that it automatically handles the advertising of the address. Use the network service access point (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 client using an NSAP address.

	ATM and Layer 3 Switch Router Software Configuration Guide
24-20	OL-1911-05