topic Re: CSS VIP and IP redundancy in Application Networking

CSS VIP and IP redundancy

mitsukake — Thu, 12 Jul 2001 16:10:42 GMT

Hi guys, I need some help. I want to set up 2 CSS. CSS1 is gonna get .56.100 as a master virtual router for vip and .60.100 as a backup. CSS2 is getting 60.100 as a backup and 56.100 as a master. CSS1 and CSS2 are connected via a two 2924XL (CSS1 to the first switch and CSS2 to the second, switches are connected to each other using 802.1Q). I also have 2 7204 connected to the 2924XL and to each other configured with MHSRP. (.56.1 master and 60.2 backup and vice versa for the second router)

I am kind of lost with the VLAN config. I read and reread cisco's docs.

Here is what I did so far:

CSS1:

Circuit VLAN10

ip address .56.100/24

ip virtual router 1 priority 100 preempt

ip address .60.100/24

ip virtual router 2 priority 90 preempt

CSS2:

Circuit VLAN10

ip address .56.100/24

ip virtual router 1 priority 90 preempt

ip address .60.100/24

ip virtual router 2 priority 100 preempt

If you need any more infos or I am not clear enough plz post and I will answer as soon as I can. Thx for your help

Re: CSS VIP and IP redundancy

9spage — Fri, 13 Jul 2001 11:01:02 GMT

Hi,

We run a very similar setup here, we have vlan redundancy if you have another email address I can email the parts of our CSS config to help you.

Re: CSS VIP and IP redundancy

mitsukake — Sat, 14 Jul 2001 03:53:31 GMT

Hello and thank you for the reply. I found the exact configuration on cisco site. Unfortunately, theey don't list the complete configuration corresponding to the figure and I need that to completely understand the settings. http://www.cisco.com/univercd/cc/td/doc/product/webscale/css/advcfggd/vipredun.htm.

It's figure 4.1. That's exactly what we wanna do.

Oops I forgot to update my email. it's mehdi@ollwin.com.

Regards

Re: CSS VIP and IP redundancy

bradleywong — Mon, 16 Jul 2001 14:46:12 GMT

I have a similar settings on our CSS infrastructure. Instead of using 2924 and 7204, we use two 6509. Here is the configuration:

CSS1

====

circuit VLAN102

ip address x2.y2.z2.3 255.255.255.0

ip virtual-router 2 priority 90 preempt

ip redundant-interface 2 x2.y2.z2.1

ip redundant-vip 2 x2.y2.z2.21

ip redundant-vip 2 x2.y2.z2.22

ip redundant-vip 2 x2.y2.z2.23

ip redundant-vip 2 x2.y2.z2.24

ip redundant-vip 2 x2.y2.z2.25

circuit VLAN106

ip address a6.b6.c6.3 255.255.255.0

ip virtual-router 6 priority 90 preempt

ip redundant-interface 6 a6.b6.c6.1

circuit VLAN101

ip address x1.y1.z1.3 255.255.255.0

ip virtual-router 1 priority 110 preempt

ip redundant-interface 1 x1.y1.z1.1

ip redundant-vip 1 x1.y1.z1.21

ip redundant-vip 1 x1.y1.z1.22

ip redundant-vip 1 x1.y1.z1.23

ip redundant-vip 1 x1.y1.z1.24

ip redundant-vip 1 x1.y1.z1.25

circuit VLAN105

ip address a5.b5.c5.3 255.255.255.0

ip virtual-router 5 priority 110 preempt

ip redundant-interface 5 a5.b5.c5.1

CSS2

====

circuit VLAN102

ip address x2.y2.z2.4 255.255.255.0

ip virtual-router 2 priority 110 preempt

ip redundant-interface 2 x2.y2.z2.1

ip redundant-vip 2 x2.y2.z2.21

ip redundant-vip 2 x2.y2.z2.22

ip redundant-vip 2 x2.y2.z2.23

ip redundant-vip 2 x2.y2.z2.24

ip redundant-vip 2 x2.y2.z2.25

circuit VLAN101

ip address x1.y1.z1.4 255.255.255.0

ip virtual-router 1 priority 90 preempt

ip redundant-interface 1 x1.y1.z1.1

ip redundant-vip 1 x1.y1.z1.21

ip redundant-vip 1 x1.y1.z1.22

ip redundant-vip 1 x1.y1.z1.23

ip redundant-vip 1 x1.y1.z1.24

ip redundant-vip 1 x1.y1.z1.25

circuit VLAN105

ip address a5.b5.c5.4 255.255.255.0

ip virtual-router 5 priority 90 preempt

ip redundant-interface 5 a5.b5.c5.1

circuit VLAN106

ip address a6.b6.c6.4 255.255.255.0

ip virtual-router 6 priority 110 preempt

ip redundant-interface 6 a5.b5.c5.1

x1.y1.z1.0, x2.y2.z2.0, a5.b5.c5.0 and a6.b6.c6.0 are network addresses. Use x1.y1.z1 and x2.y2.z2 for your outside network addresses. Use a5.b5.c5 and a6.b6.c6 for inside addresses.

The addresses following the command of "ip redundant-vip" are the content vip address that you defined with you content rules.

I hope this help.

Brad

Re: CSS VIP and IP redundancy

mitsukake — Mon, 16 Jul 2001 19:17:36 GMT

Hi I'm still missing stuff to completely understand. Please bear with me 😉

How do you choose the IP of your VLAN? Any ip in the subnet will do?what's the purpose of setting a VLAN when using the CSS? The same as usual?

Why do we have to map a redundant interface to a virtual router? I understand when we map a VIP to a virtual router but why map a redundant interface to the virtual router.

Sorry to have so many questions but this is my first project on CSS...I am sure that after that one things will go smoothly (I hope :))

Thanks for sharing the knowledge

PS: Thank you for the config Brad

Re: CSS VIP and IP redundancy

mitsukake — Wed, 18 Jul 2001 21:02:42 GMT

Up. Anyone?

Re: CSS VIP and IP redundancy

bradleywong — Thu, 19 Jul 2001 14:10:56 GMT

The x.y.z networks are the public registered network and the a.b.c networks are your internal network.

Mapping the redundant-interface to the virtual router is like creating a HSRP ip address. I used it to make the internal ip addresses routable within the corporate network via any CSS.

For example:

ip route a5.b5.c5.0 255.255.255.0 x1.y1.z1.1

Hope this help.

Brad

Re: CSS VIP and IP redundancy

mitsukake — Sun, 22 Jul 2001 20:04:11 GMT

I thought that mapping the VIP address to the virtual router is like creating a HSRP address.

Anyway things are starting to get clear now thx to your help all...:)

One more question thought...what ip the servers must get as a gateway? The redundant interface or the vip?

I got put on that project because the person initialy in charge is on vacation. That's why my questions can sound so "basic".