Configuration Guide User guide

FastIron Configuration Guide 845
53-1002494-02
Basic MCT configuration
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Using the keep-alive VLAN
CCRR messages are used to exchange information between peer devices. When the CCP is up,
CCRR messages are sent over the CCP. When the CCP client reachability is down, you can use the
keep-alive-vlan command under the cluster context so CCRR messages are periodically sent over
the keep-alive VLAN. Only one VLAN can be configured as a keep-alive VLAN. The keep-alive VLAN
cannot be a member VLAN of the MCT and this VLAN can be tagged or untagged.
NOTE
Keep-alive VLAN configuration is not allowed when the client isolation mode is strict, and when the
keep-alive VLAN is configured, client isolation mode cannot be configured as strict.
Brocade-1(config-cluster-SX))#keep-alive-vlan 10
Syntax: [no] keep-alive-vlan <vlan-id>
The <vlan_id> variable specifies the VLAN range. Possible values are from 1 to 4089.
When the CCP is down, the following results occur.
• If the keep-alive VLAN is configured, then CCRR messages are sent every second over that
VLAN.
• When CCP is down and the keep-alive VLAN is configured, master/slave selection is based on
following criteria:
• If one device’s CCEPs are up and the peer’s CCEPs are down, then the peer with the local
CCEPs down becomes the slave.
• Otherwise, the device with the higher RBridgeID becomes the slave.
• If no packets are received from the peer device for a period of three seconds, then the peer is
considered down.
• If the keep-alive VLAN is not configured and both the peer devices are up, then both peers
keep forwarding the traffic independently.
Setting keep-alive timers and hold-time
To specify the keep-alive timers and hold time for the peer devices, enter a command such as the
following.
Brocade-1(config-cluster-SX))# peer 1.1.1.3 timers keep-alive 40 hold-time 120
Syntax: [no] peer <peer-ip> timers keep-alive <keep-alive time> hold-time <hold-time>
The <peer-ip> parameter should be in the same subnet as the cluster management interface.
The <keep-alive time> variable can be from 0 to 21845. The default is 10 seconds.
The <hold-time> variable can be from 3 to 65535 and must be at least 3 times the keep-alive time.
The default is 90 seconds.
NOTE
The keep-alive VLAN and keep-alive timers are not related. The keep-alive timer is used by CCP.