Can I configure more than one standby group with the same group
number?
Hi,
Yes. However, Cisco does not recommend it on lower-end platforms such as the 4x00 series and earlier. If the same group number is assigned to multiple standby groups, it creates a non-unique MAC address. This is seen as the MAC address of the router, and it is filtered out if more than one router in a LAN becomes active. This behavior can change in future releases of Cisco IOS®.
Note: 4x00 series and earlier do not have the hardware required to support more than one MAC address at a time on Ethernet interfaces. However, the Cisco 2600 and Cisco 3600 do support multiple MAC addresses on all Ethernet and Fast Ethernet interfaces.
Hope to Help !!
Ganesh.H
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