Hello, I configured a Big-IP for loadbalance of 2 links: Node for ISP1 x.x.x.1Node for ISP2 x.x.x.17Pool Internet with Nodes ISP1 and ISP2.Virtual Server Gateway, destination 0.0.0.0 with pool Internet with Round-Robin balance.Virtual Address 0.0.0.0 with ICMP echo disabled. When I enabled the ICMP echo in Virtual Address 0.0.0.0, I have ping, but the DNS resolution fail. Can you help me?. Regards, Oscar Ponce

is the virtual server configured for TCP-only or "All Protocols"?

It's configured for All-Protocols

What have you configured as your DNS setttings? What are trying to resolve? Can see queries on port 53 via tcpdump?

Forum Discussion

Nimbostratus

Feb 09, 2015

Hello,

I configured a Big-IP for loadbalance of 2 links:

Node for ISP1 x.x.x.1
Node for ISP2 x.x.x.17
Pool Internet with Nodes ISP1 and ISP2.
Virtual Server Gateway, destination 0.0.0.0 with pool Internet with Round-Robin balance.
Virtual Address 0.0.0.0 with ICMP echo disabled.

When I enabled the ICMP echo in Virtual Address 0.0.0.0, I have ping, but the DNS resolution fail. Can you help me?.

Regards,

Oscar Ponce

shaggy
Nimbostratus
Feb 09, 2015
is the virtual server configured for TCP-only or "All Protocols"?
Oscar_Ponce_168
Nimbostratus
Feb 09, 2015
It's configured for All-Protocols
NikhilB
Employee
Feb 09, 2015
What have you configured as your DNS setttings?

What are trying to resolve?

Can see queries on port 53 via tcpdump?
Oscar_Ponce_168
Nimbostratus
Feb 18, 2015
I don't have a DNS settings on Big-IP. When I enabled the ICMP echo in Virtual address 0.0.0.0, I lost DNS resolution to internet.