HSRP working but my client's SAPGUI still drops

[inghau]

Hi guys

Right now i was ordered to configure a new Switch redundancy farm.

It consist of two Cat4503 (SupIV, 6GBIC, 24port 10/100/1000T) as the core1 and core2, Two 3550-12T for the server farm, and the rest are some 3500XL series that directly connected with two 1000BaseT trunk ISL to the core1 and core2.

we have 6 VLAN (server vlan, client vlan, legacy vlan, router vlan, internet vlan etc)

i have configured HSRP thanks to many documentations from cisco,

but still we experiencing user disconnect problem when we try to shutdown the core1 to see the HSRP works (when they try to reconnect again they can connect to the server again using the core2)

Ihav try " standby timers msec 50 msec 200" assuming that the standard HSRP was not fast enough to recover the session but still not work. :(

my servers were using two broadcom 1000T ethernet connected to the both 3550-12T

is theere anything that i missed ?

please advice

Sab

[mschooley]

did you set the priority of core1 greater than 100 and use the preempt command?

[inghau]

Hi mschooley thanks for your attention.

yes i use priority 120 on core 1 on all vlan and in core2 the priority is 110

and yes i use preempt command

yesterday i've try to develop a new vlan just for testing (VLAN100) and try to connect to the VLAN21

and i try to simulate the HSRP takeover (then i shutdown the int vlan 100 on core2 to see the switch over)

i found out that the connection were not dropped :)

but i havent tried on real conditions where VLAN21 and VLAN100 were collaps on core1.

there's one other thing i was curious, which is better configuration :

a. i put all the active standby vlan on core1 , or

b. i put few active standby vlan on core1 and few more on core2.

I think the second one is better. is it true ?

this is the current config of core1 and core2

please advice

Sab

CORE1 :

interface Vlan1

description Legacy's VLAN

ip address 141.1.2.3 255.255.0.0

no ip redirects

standby 1 ip 141.1.2.1

standby 1 timers 1 2

standby 1 priority 120

standby 1 preempt delay sync 2

!

interface Vlan20

ip address 10.2.0.3 255.255.255.0

no ip redirects

standby 20 ip 10.2.0.2

standby 20 timers 1 2

standby 20 priority 120

standby 20 preempt delay sync 2

!

interface Vlan21

description SAP Server's VLAN

ip address 10.2.1.2 255.255.255.0

no ip redirects

standby 21 ip 10.2.1.1

standby 21 timers 1 2

standby 21 priority 120

standby 21 preempt delay sync 2

!

interface Vlan22

description SAP Client's VLAN

ip address 10.2.2.2 255.255.255.0

no ip redirects

standby 22 ip 10.2.2.1

standby 22 timers 1 2

standby 22 priority 120

standby 22 preempt delay sync 2

!

interface Vlan100

ip address 10.10.10.2 255.255.255.0

no ip redirects

standby 100 ip 10.10.10.1

standby 100 timers 1 2

standby 100 priority 90

standby 100 preempt

CORE2 ::

interface Vlan1

description Legacy's VLAN

ip address 141.1.2.4 255.255.0.0

no ip redirects

standby 1 ip 141.1.2.1

standby 1 timers 1 2

standby 1 preempt delay sync 2

interface Vlan20

ip address 10.2.0.4 255.255.255.0

no ip redirects

standby 20 ip 10.2.0.2

standby 20 timers 1 2

standby 20 preempt delay sync 2

!

interface Vlan21

description SAP Server's VLAN

ip address 10.2.1.3 255.255.255.0

no ip redirects

standby 21 ip 10.2.1.1

standby 21 timers 1 2

standby 21 preempt delay sync 2

!

interface Vlan22

description SAP Client's VLAN

ip address 10.2.2.3 255.255.255.0

no ip redirects

standby 22 ip 10.2.2.1

standby 22 timers 1 2

standby 22 preempt delay sync 2

!

interface Vlan100

ip address 10.10.10.3 255.255.255.0

no ip redirects

standby 100 ip 10.10.10.1

standby 100 timers 1 2

standby 100 priority 110

standby 100 preempt