Confirming The Lec Configuration; Configuring Jumbo Frames - Cisco Catalyst 8540 MSR Configuration Manual

Configuring Jumbo Frames

Switch(config)# map-list net1011
Switch(config-map-list)# ip 2.0.0.2 atm-vc 101
Switch(config-map-list)# end
Switch#
Router 2 ATM Interface
Router2# configure terminal
Router2(config)# interface atm 3/0
Router2(config-if)# ip address 2.0.0.2 255.0.0.0
Router2(config-if)# no ip mroute-cache
Router2(config-if)# atm pvc 1 0 5 qsaal
Router2(config-if)# atm pvc 2 0 16 ilmi
Router2(config-if)# map-group net1011
Router2(config-if)# atm pvc 2 0 101 aal5snap
Router2(config-if)# exit
Router2(config)# map-list net1011
Router2(config-map-list)# ip 2.0.0.1 atm-vc 101
Router2(config-map-list)# end
Router2#

Confirming the LEC Configuration

To confirm the LEC configuration on the ATM switch router, use the following EXEC commands:
Command
show lane [interface atm
card/subcard/port[.subinterface#] |
name elan-name] [brief]
show lane client [interface atm
card/subcard/port[.subinterface#] |
name elan-name] [brief]
show lane config [interface atm
card/subcard/port[.subinterface#]]
Configuring Jumbo Frames
Jumbo frames are frames larger than the standard Ethernet frame size, which is 1518 bytes (including
Layer 2 (L2) header and Frame Check Sequence (FCS)). You can use the mtu command in interface
configuration mode to configure a non-default value for the frame.
For enhanced Gigabit Ethernet interface modules, MTU on the subinterface should be less than or equal
Note
to the MTU on the main interface.
Using a consistent and max-sized MTU across multiple interfaces in your network reduces or eliminates
fragmentation. Larger MTUs can enhance TCP performance by eliminating fragmentation, so
applications such as Network File System (NFS) can take greater advantage of their large native MTUs
of around 8 KB.
ATM Switch Router Software Configuration Guide
25-16
Chapter 25 Configuring ATM Router Module Interfaces
Purpose
Displays the global and per-virtual channel
connection LANE information for all the LANE
components and emulated LANs configured on
an interface or any of its subinterfaces.
Displays the global and per-VCC LANE
information for all LANE clients configured on
any subinterface or emulated LAN.
Displays the global and per-VCC LANE
information for the configuration server
configured on any interface.
OL-7396-01