How to Prevent Single point Fail-over on LAN Swicth 3750

Unanswered Question
Oct 17th, 2008

Hi,

Can someone please advice or informe me on what technology or how to prevent fail-Over on Catalyst Switch 3750 used at distribution layer (Router on Stick) for VLAN in the Topology. I had HSRP already at Core Layer.

R1 R2

\(HSRP)/

|

SW

|

|

FW-------DMZ

|

|

SW (3750)

/ | \

SW1 SW2 SW3>(LAN 2950G)

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 3.7 (3 ratings)
Loading.
Davy Ad Sat, 10/18/2008 - 01:50

Thanks

I hope this will not make you feel that i am disturbing you Could you please send me the link to do this or explaine.Thanks a Lot

In the primary 3750:-

interface vlan xx

ip address y.y.y.y z.z.z.z

standby vv ip address w.w.w.w

standby vv timers 1 3

standby vv priority 240

standby vv preempt

ip route 0.0.0.0 0.0.0.0 <>

In the secondary 3750:-

interface vlan xx

ip address t.t.t.t u.u.u.u

standby vv ip address w.w.w.w

standby vv timers 1 3

standby vv priority 200

standby vv preempt

ip route 0.0.0.0 0.0.0.0 <>

Also make the primary 3750 the spanningtree root. connect backup connections to the

secondary 3750 and configure as the alternate spanningtree root.

In the primary 3750:-

spanning-tree vlan 1-1024 root primary

In the secondary 3750:-

spanning-tree vlan 1-1024 root secondary

xx = vlan number

y.y.y.y = ip address , i.e 192.168.1.253

z.z.z.z = subnet mask, i.e 255.255.255.0

vv = vlan number

w.w.w.w = standby ip address, i.e 192.168.1.254

t.t.t.t = ip address, i.e 192.168.1.252

u.u.u.u = subnet mask, i.e 255.255.255.0

w.w.w.w = stnadby ip address, i.e 192.168.1.254

HTH>

Davy Ad Sat, 10/18/2008 - 03:24

Appreciate ! More Grace and knowledge to You

Thanks

DAK

Davy Ad Mon, 10/20/2008 - 04:11

Once again would it be better ,if i use only Switch Stack method for the two 3750 instead of HSRP?

Actions

This Discussion