Specifications

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Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
Chapter 8 Managing PNNI Nodes and PNNI Routing
Maintaining a Persistent Network Topology for CWM
Disabling a Gateway Node
To disable a node’s status as a gateway node, use the following procedure:
Step 1 Establish a configuration session on the switch you want to become the gateway node, using a user name
with SUPER_GP privileges or higher.
Step 2 On the active PXM card, enter the cnftopogw off command to disable the node’s status as the gateway
node for the peer group, as shown in the following example.
8830_CH.1.PXM.a > cnftopogw off
Step 3 Enter the dsptopogw command to verify that the current node is functioning as a gateway, as shown in
the following example.
8830_CH.1.PXM.a > dsptopogw
Admin State : DISABLED Operational State DISABLING
The display shows that the gateway node is going through the disabling process. During this period, do
not perform any configuration on the topology database. Enter the dsptopogw command again until the
Operational State shows that the disabling process is DISABLED, as shown in the following example.
8830_CH.1.PXM.a > dsptopogw
Admin State : DISABLED Operational State DISABLED
Once a gateway node has been disabled, that node operates as a regular non-gateway node in the peer
group. If another node in the peer group is not configured as a gateway node, CWM will not maintain a
persistent topology of that peer group.
Deleting a Node from the Topology Database
When a node is removed from the network, it is not automatically removed from the network topology
database. Because information about the removed node is stored in the topology databases of every other
node in the peer group, you need to delete the removed node from each node’s topology database,
regardless of whether the node is a gateway or non-gateway node.
Use the following procedure to delete a node from the topology database.
Step 1 Physically remove the node from the network by disconnecting the cables, downing all the links between
that node and the network, or powering down that node.
Caution Wait for at least one hour before proceeding to Step 2. This ensures that the information for the deleted
node will not be added back into the topo database of the other nodes in the peer group if any of them
are rebooted.
Step 2 Establish a configuration session using a user name with SUPER_GP privileges or higher.
Step 3 Enter the dsptopondlist command to display all nodes in the topology node list and obtain the topology
index number of the node you want to delete.