Software Configuration of ATM ISE Line Cards for Cisco 12000 Series Routers
How to Configure Layer 3 Terminated VCs on the 4-Port ATM ISE Line Card
21
Cisco IOS Release 12.0(27)S
•
Set the MTU as low as possible on each subinterface, using the
ip mtu
command, while still
avoiding fragmentation. Fragmentation causes extreme performance degradation, because it is done
in the slow path. Do not decrease the MTU to the point where it causes fragmentation.
Note
Changing MTU settings may cause all VCs on the interface or subinterface to be torn down and
set back up.
If none of the classes is a priority class, the maximum number of classes that can be configured with the
bandwidth
command, excluding the class-default class, is six. When class-default is not specified, at
least 1 percent must be allocated to this class.
If priority is not specified on any class, then any form of the
bandwidth
command can be used. If the
priority
command is configured without a
police
command (drop exceed-action), then the only form of
the bandwidth command that is allowed on the other classes in the policy map is the
bandwidth
remaining
command. If a
police
command is used on the priority queue, then all forms of the
bandwidth
commands are allowed.
SUMMARY STEPS
1.
enable
2.
configure
terminal
3.
policy-map
policy-name
4.
class
class-name
5.
priority
6.
class
class-name
7.
bandwidth
remaining percent
percent
8.
class class-default
9.
exit
10.
exit
11.
interface atm
slot/port.subifnum
12.
pvc
vpi/vci
13.
service-policy output
policy-name
DETAILED STEPS
Command or Action
Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
•
Enter your password if prompted.
Step 2
configure
terminal
Example:
Router# configure terminal
Enters global configuration mode.
