Cisco CATALYST 2960

6-6
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
OL-26520-01
Chapter 6 Clustering Switches
Planning a Switch Cluster
Figure 6-1 Discovery Through CDP Hops
Discovery Through Non-CDP-Capable and Noncluster-Capable Devices
If a cluster command switch is connected to a non-CDP-capable third-party hub (such as a non-Cisco
hub), it can discover cluster-enabled devices connected to that third-party hub. However, if the cluster
command switch is connected to a noncluster-capable Cisco device, it cannot discover a cluster-enabled
device connected beyond the noncluster-capable Cisco device.
Figure 6-2 shows that the cluster command switch discovers the switch that is connected to a third-party
hub. However, the cluster command switch does not discover the switch that is connected to a
Catalyst 5000 switch.
Figure 6-2 Discovery Through Non-CDP-Capable and Noncluster-Capable Devices
Command device
Member
device 10
Member
device 8
Member
device 9
VLAN 62
Edge of
cluster
VLAN 16
101321
Device 11
candidate
device
Candidate
devices
Device 12
Device 13
Device 14
Device 15
Command device
Catalyst 5000 switch
(noncluster-capable)
Third-party hub
(non-CDP-capable)
Candidate device Candidate device
89377