Cisco CRS-1 - Carrier Routing System Router Migration Guide

2-3
Cisco CRS-1 Carrier Routing System to Cisco CRS-3 Carrier Routing System Migration Guide
OL-13669-03
Chapter 2 Downgrading Your Cisco CRS-3 Carrier Routing System Router Back to a Cisco CRS-1 Carrier Routing
System Router
Downgrading your Cisco CRS-3 Carrier Routing System 16-Slot Line Card Chassis Back to a Cisco CRS-1 Carrier
Routing System 16-Slot Line Card Chassis
• Swap the Cisco CRS-3 Fabric with the Newly Installed Cisco CRS-1 Fabric, page 2-6
• Power-up the Newly Installed Cisco CRS-1 Fabric Card, page 2-17
• Booting Up the Newly Downgraded Cisco CRS-1 Fabric, page 2-17
• Administratively Enabling the Fabric Plane, page 2-18
• Verifying Traffic Statistics on the Newly Downgraded Cisco CRS-1 Node, page 2-18
• Verifying Fabric Link Connectivity, page 2-39
• Downgrading the Next Legacy Node, page 2-41
Verifying the Fabric Plane Status
First, execute the show platform command to verify that all Cisco CRS-3 fabric cards are operational
(i.e. IOS-XR RUN) and all Fabric Planes are UP.
RP/0/RP0/CPU0:router(admin)#show platform
Node Type PLIM State Config State
<snip>
0/SM0/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
0/SM1/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
0/SM2/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
0/SM3/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
0/SM4/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
0/SM5/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
0/SM6/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
0/SM7/SP FC-140G/S(SP) N/A IOS XR RUN PWR,NSHUT,MON
<snip>
Next, execute the show controllers fabric plane all command to verify that all Fabric Planes are UP:
RP/0/RP0/CPU0:router(admin)#show controllers fabric plane all
<snip>
Plane Admin Oper up->dn up->mcast
Id State State counter counter
---------------------------------------------
0 UP UP 0 0
1 UP UP 0 0
2 UP UP 0 0
3 UP UP 0 0
4 UP UP 0 0
5 UP UP 0 0
6 UP UP 0 0
7 UP UP 0 0
Note The up->down counter records the number of times the plane has flapped between UP and
DOWN. Similarly, up->mcast_Down counter records the number of plane transitions between
MCAST_DOWN and UP].
Before starting the downgrade process, take a snapshot of the traffic flowing through the router and use
it as a benchmark to compare against traffic flow during the downgrade and/or after completing the
downgrade. Since it is a hitless downgrade, there should be zero impact to the traffic flow during the
downgrade and/or after completing the downgrade.
RP/0/RP0/CPU0:router(admin)#show controllers fabric plane 0 statistics detail

Cisco CRS-1 - Carrier Routing System Router Specifications

General

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