13-4
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 13
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 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 ARP
table can be idle before the server takes any action to timeout the entry.
Command
Purpose
Step 1
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.
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
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.
Step 5
Switch(config-if)#
atm route
addr-prefix
2
{
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 Catalyst 8540 MSR enhanced ATM
router module interface. See the following note.
