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
13
Cisco IOS Release 12.0(27)S
OAM Management
By default, end-to-end F5 OAM loopback cell generation is turned off for each PVC. A PVC is
determined as down when any of the following is true on that PVC:
•
The router does not receive a loopback reply after a configured number of retries of sending
end-to-end F5 OAM loopback cells.
•
The router receives a Virtual Circuit-Alarm Indication Signal (VC-AIS) cell.
The router receives a Virtual Circuit-Remote Detect Indicator (VC-RDI) cell.
A PVC is determined as up when all the following are true on that PVC:
•
The router receives a configured number of successive end-to-end F5 OAM loopback cell replies.
•
The router does not receive VC-AIS cell for 3 seconds.
•
The router does not receive VC-RDI cell for 3 seconds.
Note the following regarding OAM management:
•
When OAM management is not enabled, loopback (LB) cells received by the PVC are looped back
to the sender, and for any received F4/F5-AIS, F4/F5-RDI cells are transmitted via this PVC, but the
PVC state is not changed.
The 4-Port ATM ISE line card supports OAM management enabled mode for the entire range of VCs
supported, while using the default frequency of 10 seconds on all VCs. The minimum OAM LB cell
frequency of 1 second is currently permitted over no more then 50 PVCs (chassis performance
limitation), and the default interval of 10 seconds is used for the rest of the PVCs.
OAM F5 Continuity Check
The 4-Port ATM ISE line card also provides OAM support for the use of F5 segment and end-to-end
continuity check (CC) cells to detect connectivity failures at the ATM layer. It also generates various
Simple Network Management Protocol (SNMP) notifications when CC cells indicate virtual circuit (VC)
connectivity failure
ATM OAM F5 CC cells provide an in-service tool optimized to detect connectivity problems at the VC
level of the ATM layer. CC cells are sent between a router designated as the source location and a router
designated as the sink location. The local router can be configured as the source, the sink, or both.
Step 7
oam-pvc manage cc
{
end
|
segment
}
[
direction
{
both
|
sink
|
source
}]
[
keep-vc-up
[
end aisrdi failure
|
seg
aisrdi failure
]]
Example:
Router(config-if-atm-vc)# oam-pvc manage
cc segment direction source
Configures ATM OAM F5 continuity check (CC) management to
detect connectivity failures at the ATM layer.
Step 8
oam retry cc
{
end
|
segment
}
[
activation-count
[
deactivation-count
[
retry-frequency
]]]
Example:
Router(config-if-atm-vc)# oam retry cc
segment 10 10 30
Configures the retry count and the frequency at which CC
activation and deactivation requests are sent to the device at the
other end of the PVC or the segment.
Command or Action
Purpose
