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24-22
ATM and Layer 3 Switch Router Software Configuration Guide
OL-1911-05
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:
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
Command Purpose
Step 1
Switch(config)# interface atm
card/subcard/port[.subinterface#]
Switch(config-if)#
Selects the Catalyst 8540 MSR enhanced ATM
router module interface.
Step 2
Switch(config-if)# atm nsap-address
nsap-address
or
Switch(config-if)# atm esi-address esi.selector
Specifies the NSAP ATM address of the interface.
or
Specifies the end-system-identifier 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 time-out
minutes
1
1. This form of the atm arp-server command indicates that this interface performs the ATM ARP server functions. When you
configure the ATM ARP client (described earlier), the atm arp-server command is used—with a different keyword and
argument—to identify a different ATM ARP server to the client.
Configures the ATM ARP server optional idle
timer.
Step 5
Switch(config-if)# atm route addr-prefix
2
atm
card/subcard/port internal
2. Address prefix is the first 19 bytes of the NSAP address.
Configures a static route through the optional
ATM router module interface.