Network Partitions; Managing The Control Center - Cisco CRS-1 - Carrier Routing System Router Administration Manual

Chapter 8 Managing the Cisco CRS System

Network Partitions

Managing the Control Center

• The standby server becomes the new active server. Until the former active
server is recovered or a new Unified CCX server is brought online, the system
will be running without any standby capability. When the former active server
or a new server is brought online, it will become the new standby server.
Network malfunction or misconfiguration can create network partitions and split
the network into separate islands. If a node enters this state, the node is referred
to as being in the island mode. Nodes in the island mode are hard to detect. While
these nodes can communicate within a partitioned island, they cannot
communicate between partitioned islands. If the islands do not communicate, then
each island will select its own active server.
Generally, you can connect to the Cisco CRS administration on any node, and see
a consistent cluster view. If a node is in the island mode, you will see different
cluster views when you connect to nodes in each island.
If your node enters the island mode, perform one of the following tasks:
restart every cluster node, or
•
stop all cluster nodes, and restart the cluster nodes.
•
If the cluster node cannot be restarted, first ensure that all nodes are functioning
as desired. Next, from each node, verify the accessibility to every other node.
Use the Control Center Server Configuration pages to:
Add licenses (see
•
• Activate or deactivate components (see
Remove a server from the cluster (see
•
Disable a server temporarily or permanently (see
•
page 8-13
Start, stop, and restart services (see
•
Cisco CRS Services, page
Reelect master for a particular service (see
•
Cisco Customer Response Solutions Administration Guide, Release 4.1(1)
Adding Licenses and Activating Components, page 8-10
Activating a Component, page
Removing a Server, page
Starting, Stopping, and Restarting
8-14)
Managing the Control Center
8-12)
Disabling a Server,
Reelect Master, page 8-15)
8-11)
8-7