10-17-2008 11:43 AM - edited 03-03-2019 11:58 PM
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)
10-18-2008 01:35 AM
Install another 3750 - create layer 3 SVI, run HSRP between them.
HTH>
10-18-2008 01:50 AM
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
10-18-2008 02:05 AM
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>
10-18-2008 03:24 AM
Appreciate ! More Grace and knowledge to You
Thanks
DAK
10-18-2008 03:33 AM
np - glad to help.
10-20-2008 04:11 AM
Once again would it be better ,if i use only Switch Stack method for the two 3750 instead of HSRP?
10-20-2008 04:19 AM
You could do that - but what if you have a power or cable failure, your whole stack is a single point of failure?
It's really up to you on how inportant up-time is for your organisation?
HTH>
10-20-2008 07:46 AM
thanks for your advice
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