Recovering From Lost Cluster Member Connectivity - Cisco Catalyst 2975 Software Configuration Manual

Recovering from Lost Cluster Member Connectivity

When prompted, assign a name to the cluster, and press Return.
Step 10
The cluster name can be 1 to 31 alphanumeric characters, dashes, or underscores.
When the initial configuration displays, verify that the addresses are correct.
Step 11
If the displayed information is correct, enter Y, and press Return.
Step 12
If this information is not correct, enter N, press Return, and begin again at Step 9.
Start your browser, and enter the IP address of the new command switch.
Step 13
From the Cluster menu, select Add to Cluster to display a list of candidate switches to add to the cluster.
Step 14
Recovering from Lost Cluster Member Connectivity
Some configurations can prevent the command switch from maintaining contact with member switches.
If you are unable to maintain management contact with a member, and the member switch is forwarding
packets normally, check for these conflicts:
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•
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Preventing Autonegotiation Mismatches
The IEEE 802.3ab autonegotiation protocol manages the switch settings for speed (10 Mb/s, 100 Mb/s,
and 1000 Mb/s, excluding SFP module ports) and duplex (half or full). There are situations when this
protocol can incorrectly align these settings, reducing performance. A mismatch occurs under these
circumstances:
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•
To maximize switch performance and ensure a link, follow one of these guidelines when changing the
settings for duplex and speed:
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If a remote device does not autonegotiate, configure the duplex settings on the two ports to match. The
Note
speed parameter can adjust itself even if the connected port does not autonegotiate.
Catalyst 2975 Switch Software Configuration Guide
38-12
A member switch (Catalyst 3750, Catalyst 3560, Catalyst 3550, Catalyst 3500 XL, Catalyst 2970,
Catalyst 2960, Catalyst 2950, Catalyst 2900 XL, Catalyst 2820, and Catalyst 1900 switch) cannot
connect to the command switch through a port that is defined as a network port.
Catalyst 3500 XL, Catalyst 2900 XL, Catalyst 2820, and Catalyst 1900 member switches must
connect to the command switch through a port that belongs to the same management VLAN.
A member switch (Catalyst 3750, Catalyst 3560, Catalyst 3550, Catalyst 2970, Catalyst 2960,
Catalyst 2950, Catalyst 3500 XL, Catalyst 2900 XL, Catalyst 2820, and Catalyst 1900 switch)
connected to the command switch through a secured port can lose connectivity if the port is disabled
because of a security violation.
A manually set speed or duplex parameter is different from the manually set speed or duplex
parameter on the connected port.
A port is set to autonegotiate, and the connected port is set to full duplex with no autonegotiation.
Let both ports autonegotiate both speed and duplex.
Manually set the speed and duplex parameters for the ports on both ends of the connection.
Chapter 38 Troubleshooting
OL-19720-02