Cisco CRS-1 - Carrier Routing System Router Troubleshooting Guide

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Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
OL-21483-02
Chapter 3 Troubleshooting Forwarding
Troubleshooting Control Plane Information
Examples
The following example displays the control plane information for the software switching path. Check
for any errors or drops.
RP/0/RP0/CPU0:router# show netio idb tenGigE 0/1/1/0 location 0/1/cpu0
TenGigE0/1/1/0 (handle: 0x01180020, nodeid:0x11) netio idb:
---------------------------------
name: TenGigE0_1_1_0
interface handle: 0x01180020
interface global index: 2
physical media type: 30
dchain ptr: <0x482ae8e0>
echain ptr: <0x482d791c>
fchain ptr: <0x482d79b8>
driver cookie: <0x4824ad58>
driver func: <0x4824ad44>
number of subinterfaces: 4096
Step 4
show im chains interface-type
interface-instance
location node-id
Example:
RP/0/RP0/CPU0:router# show im chains pos
0/14/0/0 location 0/14/cpu0
or
RP/0/RP0/CPU0:router# show im chains pos
0/13/0/2 location 0/13/cpu0
Displays the output of the control plane encapsulations for
data plane forwarding.
• Check the different layers for the interface, the status
(up or down) of each layer, and the maximum
transmission unit (MTU) at each layer.
• Verify the ifhandle value the ingress line card will use
to forward packets that are destined out of the interface.
Compare the output to the expected encapsulations on the
interface, the correct MTU values, and the correct ifhandle
value from the show cef ipv4 interface command output.
Use this command for the ingress interface on the ingress
line card and the egress interface on egress line card.
Step 5
show imds interface brief
Example:
RP/0/RP0/CPU0:router# show imds interface brief
Displays interface manager distribution server (IMDS)
interface information.
Note This is just a partial output not full output.
Check the state, MTU, encapsulation being used, and the
ifhandle for each interface.
Step 6
show tbm hardware {ipv4 | ipv6} unicast dual
detail location
node-id
Example:
RP/0/RP0/CPU0:router# show tbm hardware ipv4
unicast dual detail location 0/13/cpu0
or
RP/0/RP0/CPU0:router# show tbm hardware ipv4
unicast dual detail location 0/14/cpu0
Displays tree bitmap hardware-related ingress and egress
information.
Check if there have been any failures in the different stages
of the lookup.
Use this command for the ingress and egress interfaces for
the local line card.
Step 7
Contact Cisco Technical Support. If the problem is not resolved, contact Cisco Technical
Support. For Cisco Technical Support contact information,
see the “Obtaining Documentation and Submitting a
Service Request” section on page viii in the Preface.
Command or Action Purpose

Cisco CRS-1 - Carrier Routing System Router Specifications

General

Brand	Cisco
Model	CRS-1 - Carrier Routing System Router
Category	Network Router
Language	English