Downgrading RPD and cBR-8 Router
The following scenarios are supported in downgrading the RPD and cBR-8 router.
cBR-8 original version |
RPD original version |
RPD state before upgrade |
cBR-8 upgrade version |
RPD upgrade version |
RPD state after upgrade |
---|---|---|---|---|---|
16.8.1 |
4.1 |
online |
Lower than 16.8.1 |
Lower than 4.1 |
online |
16.8.1 |
4.1 |
online |
Lower than 16.8.1 |
Lower than 4.1 |
init(gcp) |
Note |
In order for the RPD goes online, the versions of the cbr-8 and the RPD must be matched, that is, IOS XE 16.6.x works with RPD 2.x, IOS XE 16.7.x works with RPD 3.x, and IOS XE 16.8.x works with RPD 4.x. If the versions are not matched, RPD is then in the init(gcp) state. |
Before you begin
Before downgrading the system, make sure the following requirements are met:
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Download two files from the following Cisco.com Software Center URL:
https://software.cisco.com/download/type.html?mdfid=286283913&flowid=73842
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IOS XE Software:
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Version 16.7.1: cbrsup-universalk9.16.07.01.SPA.bin or
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Version 16.6.1: cbrsup-universalk9.16.06.01.SPA.bin or
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RPD Software:
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V3.1.1: RPD-V3-1-1.itb.SSA or
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V2.1: RPD-V2.1_20170725011837.itb.rel.sign.SSA
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Console access for both SUPs are required.
Note |
For more information about upgrading the cBR-8 router, see https://www.cisco.com/c/en/us/td/docs/cable/cbr/upgrade/guide/b_cbr_upgrade_16_8.html. |
Procedure
Step 1 |
Copy Cisco IOS XE software package to bootflash: and stby-bootflash:.
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Step 2 |
Verify Cisco IOS XE software package against the md5 hash as provided in the Cisco.com Software center.
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Step 3 |
Backup current running config to bootflash:.
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Step 4 |
Check system status prior to upgrade. Save the information to compare against the system status after upgrade. For the commands to use to check the status, see the show commands at the end of this section. |
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Step 5 |
Copy Cisco RPD image package to TFTP server that RPDs can reach to. |
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Step 6 |
Verify current RPD software version.
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Step 7 |
Downgrade all RPDs image via SSD from cBR-8.
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Step 8 |
Verify RPD SSD status, should be in downloading status.
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Step 9 |
Verify that all RPDs will start downloading new image then drop offline after a while.
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Step 10 |
Configure the chassis to boot the system with target Cisco IOS XE image and save running-configuration.
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Step 11 |
Reload and bring up the cBR-8 router.
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Step 12 |
Check all RPDs have been downgraded to the target version and come online succesfully.
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What to do next
These show commands may be useful in the verification test:
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show version
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show platform
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show platform diag
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show environment
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show environment power
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show platform hardware slot P <0-5> mcu status
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show facility-alarm status
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show redundancy
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show redundancy line card all
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show ip ospf neighbor
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show cable modem voice
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show cable calls
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show cable licenses all
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show inventory
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show log
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show cable rpd
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show cable modem summary total
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show cable rpd lcha
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show running
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show tech