CSS:simple questions

Unanswered Question
Aug 9th, 2008

we are going to use one arm mode to deploy our CSS 11503, please find the attached picture:

1. should the CSS connect to distribution switch (layer 3, Cat6) or access switch (layer 2)?

2. for the servers need to be balanced, do we need to change the default gateway to CSS?

3. Do we need to configure WCCP on the distribution switch? and is there any other configuration needed for distribution switch?

4. Can i have sample of configuration? thanks!

5. in order to implement redundancy, how can connect 2 CSS 11503 together? via any interface?

I have this problem too.
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bicoyle Tue, 08/19/2008 - 08:15

I'll try to answer you questions as asked. Please see this document as well

http://www.cisco.com/en/US/solutions/ns340/ns517/ns224/ns304/net_design_guidance0900aecd8010e7a8.pdf

CSM and CSS are very similar.

Q1:1. should the CSS connect to distribution switch (layer 3, Cat6) or access switch (layer 2)?

A: Depends upon the volume of traffic and if the design requires some traffic not to traverse the CSS.

• L3 if you don't want all traffic load balanced.

• L2 is fine if the CSS can handle the load of all the traffic.

Access vs distribution is again a traffic flow question & understanding of the location of the servers which require LB.

Q2. for the servers need to be balanced, do we need to change the default gateway to CSS?

A: Technically, no. In a L3 PBR design the router will re-direct the traffic back to the CSS with an appropriately configured ACL.

In an L2 to design, yes.

The third option is to implement source nat on the CSS which will change the source IP to be that of the CSS so return traffic is always sent to the CSS.

Q3: Do we need to configure WCCP on the distribution switch? and is there any other configuration needed for distribution switch?

So WCCP is not required. However in an L3 design PBR might be require (most likely).

Q4: Can i have sample of configuration? Thanks

configure

!*************************** GLOBAL ***************************

! Default Route to upstream router/interface

ip route 0.0.0.0 0.0.0.0 192.168.1.1 1

! Static Route to Customer 01

ip route 10.0.0.0 255.255.255.0 192.168.1.1 1

! Static Route to Customer 02

ip route 10.1.1.0 255.255.255.0 192.168.1.1 1

!************************** INTERFACE **************************

interface e9

bridge vlan 99

!************************** CIRCUIT **************************

circuit VLAN1

circuit VLAN99

! Circuit address of CSS02

ip address 192.168.1.253 255.255.255.0

! Shared Redundant Interface and VIP

ip virtual-router 1 priority 100

ip redundant-vip 1 192.168.1.101

ip redundant-vip 1 192.168.1.102

!************************** SERVICE **************************

service Cust01_01

ip address 10.0.0.101

keepalive type http

keepalive port 80

keepalive uri "/" !grab the root document off the web server

active

service Cust01_02

ip address 10.0.0.102

keepalive type http

keepalive port 80

keepalive uri "/" !grab the root document off the web server

active

service Cust02_01

ip address 10.1.1.101

keepalive type http

keepalive port 80

keepalive uri "/" !grab the root document off the web server

active

service Cust02_02

ip address 10.1.1.102

keepalive type http

keepalive port 80

keepalive uri "/" !grab the root document off the web server

active

!*************************** OWNER ***************************

owner Cust01

content http

vip address 192.168.1.101 !This is the address users will surf to

add service Cust01_01

add service Cust01_02

protocol tcp

port 80

balance leastconn !Use connection count to balance the traffic

active

owner Cust02

content http

vip address 192.168.1.102 !This is the address users will surf to

add service Cust02_01

add service Cust02_02

protocol tcp

port 80

balance leastconn !Use connection count to balance the traffic

active

Q5:

Please see

http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/css11000series/v6.10/configuration/advanced/guide/Redndncy.html

Just a great CSS doc:

http://www.cisco.com/en/US/products/hw/contnetw/ps792/products_white_paper09186a0080136856.shtml

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