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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter13 Configuring IP over ATM
Configuring Classical IP over ATM
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 configurin g
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 ARP
table can be idle before the server takes any action to timeout the entry.
Command Purpose
Step1 Switch(config)# interface atm 0[.subinterface#]
Switch(config-if)#
or
Switch(config)# interface atm
card/subcard/port[.subinterface#]
Switch(config-if)#
Selects the route processor interface.
or
If you are using the optional Catalyst 8540 MSR
enhanced ATM router module, specifies the ATM
interface number.
Step2 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.
Step3 Switch(config-if)# ip address ip-address mask Specifies the IP address of the interface.
Step4 Switch(config-if)# atm arp-server self [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 this interface as the ATM ARP server
for the logical IP network.
Step5 Switch(config-if)# atm route addr-prefix2 {atm 0
| atm card/subcard/port} internal
2. Address prefix is first 19 bytes of the NSAP address.
Configures a static route through the ATM switch
router to the route processor interface, or the
optional Catalyst8540 MSR enhanced ATM
router module interface. See the following note.