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Cisco Clustering

Posted on 2015-02-20
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Last Modified: 2015-02-20
I have a Cisco 3750 setup as my master and I am trying to add other cisco 2960 to the cluster by typing

on the master switch
sh clu can  this will show me and swiches connected to my switch that are canidates for clustering
so I type
cluster member 1 mac-address 0000.1111.0000.1111
I get the following error
%ERROR: member unreachable
the switches are in the correct vlans.
any Ideals on what would cause this?
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Question by:h11
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8 Comments
 
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Daniel Sheppard earned 500 total points
ID: 40621293
If you are really using a MAC similar to that, you have too many bits.  A MAC is 6 bytes (48 bits).

Otherwise, can you ping the two switches if they both have IP addresses configured?  Can you see them in your CDP topography?

These are the official Cisco Requirements:

A cluster command switch must meet these requirements:
•It is running Cisco IOS Release 12.2(25)FX or later for a Catalyst 2960 switch, or Cisco IOS Release 12.2(53)SE or later for a Catalyst 2960-S switch.
•It has an IP address.
•It has Cisco Discovery Protocol (CDP) version 2 enabled (the default).
•It is not a command or cluster member switch of another cluster.
•It is connected to the standby cluster command switches through the management VLAN and to the cluster member switches through a common VLAN.

A standby cluster command switch must meet these requirements:
•It is running Cisco IOS 12.2(25)FX or later for a Catalyst 2960 switch, or Cisco IOS Release 12.2(53)SE or later for a Catalyst 2960-S switch.
•It has an IP address.
•It has CDP version 2 enabled.
•It is connected to the command switch and to other standby command switches through its management VLAN.
•It is connected to all other cluster member switches (except the cluster command and standby command switches) through a common VLAN.
•It is redundantly connected to the cluster so that connectivity to cluster member switches is maintained.
•It is not a command or member switch of another cluster.

To join a cluster, a candidate switch must meet these requirements:
•It is running cluster-capable software.
•It has CDP version 2 enabled.
•It is not a command or cluster member switch of another cluster.
•If a cluster standby group exists, it is connected to every standby cluster command switch through at least one common VLAN. The VLAN to each standby cluster command switch can be different.
•It is connected to the cluster command switch through at least one common VLAN.



Also, all  switches need to be running LAN Base or higher to join a cluster.
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by:h11
ID: 40621329
the switch does not have an ip I am trying to configure with out using an ip. Is this not possible?

I have inheriteed this network form someone else any many of the switches already added to the cluster do not have any ips. see below for switch info.

08d0.9f80.c780 Switch       WS-C2960-8TC-S   Gi0/1         1   10 Fa0/1
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Expert Comment

by:Daniel Sheppard
ID: 40621338
I believe it may be possible, as per the requirements for the Candadite Switches, but you first should check layer 2/3 connectivity which is why I recommended configuring a IP address and enabling CDP.   You can remove the IP once you verify everything is working.
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LVL 2

Author Comment

by:h11
ID: 40621349
This is one of the switches I can control from the cluster and it has no ip on the interface

interface Vlan1
 no ip address
 no ip route-cache
!        
ip default-gateway 10.240.249.0
ip http server
ip http secure-server
!        
control-plane
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Expert Comment

by:Daniel Sheppard
ID: 40621353
You aren't getting it...

I am not saying you need to configure the IP address for it to work, I am saying you should configure the IP address to VERIFY connectivity.  When you are done, the IP address can be removed.

CDP however is required for Clustering to work, so you will need to enable CDP on the switch.
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Author Comment

by:h11
ID: 40621369
Ok I am not able to connect to the switch because I am not sure where it is located. I can see it only when I do sh clu can and that is it.

So was trying to add it to teh cluster so I could remote it. But I guess thats not possible
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LVL 6

Expert Comment

by:Daniel Sheppard
ID: 40621376
You will need to go to the switch, configure it, ensure it meets all the "Candidate" requirements, test connectivity to the other switches and then attempt to add it.
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Author Comment

by:h11
ID: 40621407
ok I will first need to find it. We have over 35 different locations it could be in. But I think I know where it is located thanks
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