Cisco Cisco Expressway
Replace a Peer
This section summarizes the procedure for replacing a cluster peer Expressway with a different unit.
1.
Ensure that the Expressway to be replaced is not the primary Expressway.
the primary.
2.
Remove the existing peer from the cluster:
a.
.
b.
3.
Replace a Peer And Keep Its Configuration
This procedure assumes that you are replacing an accessible Expressway peer with a different Expressway.
1.
Ensure that the Expressway to be replaced is not the primary Expressway.
the primary
2.
.
You must clear the clustering configuration from the peer, and update the clustering configuration on all
the other peers (primary first), before you take the backup
the other peers (primary first), before you take the backup
3.
Backup the configuration of the removed peer
4.
Generate and apply option keys for the new Expressway. You must apply the same set of keys that are applied
to the other peers
to the other peers
5.
Restore the backup onto the new Expressway
6.
Check the DNS configuration of the new Expressway is the same as the other peers, and synchronize it with
the same NTP servers
the same NTP servers
7.
You already have much of the configuration described in the linked procedure. The most important steps
described there are summarized here:
described there are summarized here:
a.
Add the new peer's address to the clustering configuration on the primary
b.
Add the new peer's address to the clustering configuration on other existing peers
c.
Enter the clustering configuration on the new peer (cluster name, shared secret, ordered peer list)
8.
Restart the new peer
9.
Wait for approximately five minutes, then check the cluster status and resolve any alarms
Note:
If you replaced a peer in a cluster of Expressway-Cs, and that cluster was configured for SSO of MRA clients,
then SSO will fail some of the time until you update the IDP with the cluster's new SAML metadata.
This is because one of the peers has a new serial number, and the serial numbers of the peers are used to generate
the cluster's metadata.
the cluster's metadata.
You must export the cluster's SAML metadata and copy it to the IDP.
.
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Cisco Expressway Cluster Creation and Maintenance Deployment Guide
Replace a Peer