Any reason to have name servers on a 2948G-L3

[efector]

I have a 2948G-L3 switch on my network, and it is not doing any type of routing. In the config, there are name servers listed, and I am sniffing the traffic, I see broadcast messages going out to these name servers. These name servers are the NS from our OLD isp, so I know my machines shouldnt be using them for name resolution. SO, do they have to be in the config? what benefit is it? What would be the downside to taking it out?

Thanks!

no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname FP-2948G-01
!

!
no ip subnet-zero
ip name-server 63.87.146.130 (DO THESE NEED TO BE IN CONFIG)
ip name-server 63.87.146.131
bridge irb
!
!
!
interface FastEthernet1
description CHECKPOINT-FW
no ip address
no ip directed-broadcast
duplex full
speed 100
bridge-group 1
!
interface FastEthernet2
description OWA
no ip address
ip broadcast-address 0.0.0.0
no ip directed-broadcast
duplex full
speed 100
bridge-group 1

interface BVI1
ip address 10.10.100.2 255.255.255.0
ip helper-address 63.87.146.131(AND WHAT ABOUT HERE?)
ip helper-address 63.87.146.130(CAN THESEE BE REMOVED?)
no ip directed-broadcast
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.10.100.1
!

 

[computerhighguy]

They don't have to be in the config. You use them for the same reason a workstation does. Name resolution.


It is what it is!!
__________________________________
A+, Net+, I-Net+, Certified Web Master, MCP, MCSA, MCSE, CCNA, CCDA, and few others (I got bored one day)

 

[pmesjar]

If you mistype the command in privileged mode, router/switch will try name resolution for it, which usually takes too long (about 2 minutes or so) and most of the time you can't even break it (my experience). To prevent this from happening, you can configure:

Switch(config)# no ip domain-lookup

while having ip name-server commands configured.

Peter Mesjar
CCNP, A+ certified
pmesjar@centrum.sk

"The only true wisdom is in knowing you know nothing.