This really comes down to network design.
Lets say you have a couple devices doing HSRP and you
want half of the users to use 1 IP address and the
other half to use another IP address for their default
gateway. The HSRP device configured for both groups is
shared by groups of users. If the router fails for
this half of users which was the HSRP master, the
standby router would become active for that IP
address. The only downfall to having both HSRP groups
/ HSRP IP address's active on one router at the same
time is then all traffic is going through that device
which may eat up more resources depending on the
traffic load. Again, this really depends on how the
network is designed and layed out for redundancy.
--- Ken Vandenbark <[EMAIL PROTECTED]> wrote:
> Is there an advantage to having more than one HSRP
> group assigned to an
> interface?
> I don't see an advantage one maybe someone has
> experienced advantages =
> in
> having multiple HSRP groups. Example of config:
> Router 1
> =20
> router1#sh run=20
> Building configuration...
> =20
> Current configuration:
> !
> version 12.0
> service timestamps debug datetime msec localtime
> show-timezone
> service timestamps log datetime msec localtime
> show-timezone
> =20
> service password-encryption
> !
> hostname router1
> !
> logging buffered 16384 debugging
> no logging console
> !
> username xxx privilege 15 password 7 xxxxxxx
> username xxx privilege 15 password 7 xxxxxxx
> !
> !
> !
> !
> clock timezone cst -6
> clock summer-time cdt recurring
> ip subnet-zero
> no ip finger
> ! =20
> no ip bootp server
> !
> !
> !
> interface FastEthernet0/0
> ip address 10.10.192.215 255.255.255.240
> no ip redirects
> no ip directed-broadcast
> speed 100
> full-duplex
> standby 3 timers 5 15
> standby 3 priority 250 preempt
> standby 3 authentication guess
> standby 3 ip 10.10.192.213
> standby 3 track FastEthernet0/1 100
> standby 4 timers 5 15
> standby 4 priority 200 preempt
> standby 4 authentication guess
> standby 4 ip 10.10.192.214
> standby 4 track FastEthernet0/1 100
> !
> interface FastEthernet0/1
> ip address 10.10.192.226 255.255.255.248
> no ip redirects
> no ip directed-broadcast
> duplex full
> speed 100
> standby timers 5 15
> standby priority 250 preempt
> standby authentication related
> standby ip 10.10.192.225
> standby track FastEthernet0/0 100
> standby 1 timer 5 15
> standby 1 priority 200 preempt
> standby 1 authentication guess
> standby 1 ip 10.10.192.228
> standby 1 track FastEthernet0/0 100
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 10.10.192.209
> ip route 0.0.0.0 0.0.0.0 10.10.192.210
> ip route 10.10.192.240 255.255.255.240 10.10.192.230
> ip route 10.10.192.240 255.255.255.240 10.10.192.229
> ip route 10.10.194.0 255.255.255.224 10.10.192.230
> ip route 10.10.194.0 255.255.255.224 10.10.192.229
> no ip http server
> !
> access-list 1 deny any
> access-list 10 permit 10.10.192.216
> access-list 10 permit xx.xx.xx.xx
> !
> Router 2
> =20
> router2#sh run=20
> Building configuration...
> =20
> Current configuration:
> !
> version 12.0
> service timestamps debug datetime msec localtime
> show-timezone
> service timestamps log datetime msec localtime
> show-timezone
> service password-encryption
> !
> hostname router2
> !
> logging buffered 16384 debugging
> no logging console
> !
> username xxx privilege 15 password 7 xxxxxxx
> username xxx privilege 15 password 7 xxxxxxx
> !
> !
> !
> !
> clock timezone cst -6
> clock summer-time cdt recurring
> ip subnet-zero
> no ip finger
> ! =20
> no ip bootp server
> !
> !
> !
> interface FastEthernet0/0
> description Exodus Facing
> ip address 10.10.192.216 255.255.255.240
> no ip redirects
> no ip directed-broadcast
> speed 100
> full-duplex
> standby 3 timers 5 15
> standby 3 priority 200 preempt
> standby 3 authentication payroll
> standby 3 ip 10.10.192.213
> standby 3 track FastEthernet0/1 100
> standby 4 timers 5 15
> standby 4 priority 250 preempt
> standby 4 authentication payroll
> standby 4 ip 10.10.192.214
> standby 4 track FastEthernet0/1 100
> !
> interface FastEthernet0/1
> description Customer Facing
> ip address 10.10.192.227 255.255.255.240
> no ip redirects
> no ip directed-broadcast
> duplex full
> speed 100
> standby timers 5 15
> standby priority 200 preempt
> standby authentication related
> standby ip 10.10.192.225
> standby track FastEthernet0/0 100
> standby 1 timer 5 15
> standby 1 priority 250 preempt
> standby 1 authentication related
> standby 1 ip 10.10.192.228
> standby 1 track FastEthernet0/0 100
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 10.10.192.209
> ip route 0.0.0.0 0.0.0.0 10.10.192.210
> ip route 10.10.192.240 255.255.255.240 10.10.192.230
> ip route 10.10.192.240 255.255.255.240 10.10.192.229
> ip route 10.10.194.0 255.255.255.224 10.10.192.230
> ip route 10.10.194.0 255.255.255.224 10.10.192.229
> no ip http server
> !
> access-list 1 deny any
> access-list 10 permit 10.10.192.217
> access-list 10 permit xx.xx.xx.xx
> !
>
> Thanks in Advance
> Ken
>
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