Asymmetric Pwe3 - Cisco 3825 Software Configuration Manual

New Features in Cisco IOS Release 12.4(16)MR1
The sample below configures cell packing for ATM port modes. It specifies a max number of cells as 28
and a cell packing timer as 3,000 microseconds.
The sample below configures cell packing for the N:1 VCC cell relay mode. It specifies a maximum
number of cells as 20 and a cell packing timer as 4,000 microseconds.
PVC Mapping
The pw-pvc command configures PVC mapping or rewrites for PW-configured PVCs. It specifies the
PW-side vpi/vci value used in sending and receiving specific PVCs.
The following example illustrates the use of PW packets for the pw-pvc command:

Asymmetric PWE3

This feature uses two different MPLS enabled IP routes in uplink and downlink directions for creating
an asymmetric backhaul path between two Mobile Wireless Routers (MWRs) acting as provider edge
(PE) routers.
For ATM over L2TPV3, this feature uses two different IP routes in uplink and downlink directions for
creating an asymmetric backhaul path between two MWRs acting as end points for an L2TPV3 tunnel.
No special configuration is needed for this feature apart from configuring the IP routes and having
multiple backhaul paths available between two MWRs.
For a configuration example, see the
Appendix B.
Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
1-22
interface ATM0/0/0
no ip address
scrambling-payload
atm mcpt-timers 1000 2000 3000
no atm ilmi-keepalive
atm cell-packing 28 mcpt-timer 3
xconnect 99.99.99.99 100 pw-class l2tp
pvc 1/35 l2transport
encapsulation aal0
!
pvc 1/36 l2transport
encapsulation aal0
!
pvc 1/37 l2transport
encapsulation aal0
!
interface ATM0/0/1
no ip address
load-interval 30
scrambling-payload
atm mcpt-timers 2000 3000 4000
no atm ilmi-keepalive
pvc 0/101 l2transport
encapsulation aal0
cell-packing 20 mcpt-timer 3
xconnect 99.99.99.99 1101 pw-class l2tp
pvc 0/40 l2transport
encapsulation aal0
pw-pvc 1/40
xconnect 1.1.1.1 40 pw-class l2tp
Chapter 1 Overview of the Cisco 3825 Mobile Wireless Edge Router
"Asymmetric PWE3 Configuration" section on page B-2 in
OL-15667-03