Allowing DNS requests via CSS

[trevorj]

Hi,

I've setup a CSS to load balance between 2 servers using layer3 balancing, but I discovered that when requesting a dns lookup (the two servers are acting as primary dns servers), I get the following response from a terminal nslookup:-

';; reply from unexpected source: 192.168.0.120#53, expected 192.168.0.101#53' Whereas 192.168.0.120 is the actual server IP and 192.168.0.101 is the VIP. Is this related to the dns server itself or the CSS?

- Trevor

[seilsz]

Trevor,

This is due to the way the CSS handles UDP traffic. There are a couple of options for dealing with DNS, which you can find more information about here:

http://www.cisco.com/en/US/partner/products/hw/contnetw/ps789/products_tech_note09186a00801e05ee.shtml

~Zach

[trevorj]

Oh, I dont have access to the URL :(

- Trevor

[seilsz · Accepted solution]

Sorry. Try this one:

http://cisco.com/en/US/products/hw/contnetw/ps789/products_tech_note09186a00801e05ee.shtml

~Zach

[trevorj]

Hey thanks, I created a group dns and it works fine!

- Trevor