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Beginner

devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

we setup a new DHCP scope and setup a couple PCs to get their IPs via the new scope.

now the PCs with the new DHCP addresses cannot ping any 2960 that's on VLAN 1.  but they're able to ping everything else on VLAN 1.

the switches in question are config-ed to run VoIP.  therefore,they have QOS, etc.  the only ACL is for the VoIP.

the devices connected to those switches can get out, etc.

i just cannot connect to the switches, either via ping or telnet.

i have several other cisco switches, i.e. 3750, 3850, etc and i can get to those.

i can provide configs per request.

 

Thoughts?

Thanks

13 REPLIES 13
Highlighted
Hall of Fame Expert

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Do the PCs getting IP from new DHCP scope have the correct gateway?

Do the 2960 switches have the correct gateway configured?

HTH

Highlighted
Beginner

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Hi!

Thanks for getting back!

As far as I know, the DHCP gateways are correct.

I say this because I can ping other switches, etc on the same subnet that the switches are on.

The switches have "ip default gateway 10.30.47.254"

.254 is our core rtr.

And, all my networking devices have that gateway


Highlighted
VIP Advocate

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Hi,

Could you share the "Show IP route" and "Show ip inter br | ex un" and Show IP access-list?

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution If this comment will make help you!
Highlighted
Beginner

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

On which switch do you want the answer from? Source or dest


Highlighted
VIP Advocate

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

The switch that is not replying to ICMP, SSH, telnet, etc. I think it is 2960.

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution If this comment will make help you!
Highlighted
Beginner

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Well, the plot thickens!

>From another switch I can telnet into the switches in question.


Highlighted
VIP Advocate

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

HI,

Are you trying to access the switch from another VLAN? 

 

If yes, then run a "no ip routing" on the switch and configure "ip defalt-gateway x.x.x.x" command.

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution If this comment will make help you!
Highlighted
Beginner

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Run "no ip routing" on the switch the PC cannot get to?


Highlighted
Beginner

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Oh! Okay. Just a sec.


Highlighted
Beginner

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

KWCHSW40#sh ip route
Default gateway is 10.30.47.254

Host Gateway Last Use Total Uses Interface
ICMP redirect cache is empty
KWCHSW40#Show ip inter br | ex un
Interface IP-Address OK? Method Status Protocol
Vlan1 10.30.47.235 YES NVRAM up up
FastEthernet0 10.128.191.235 YES NVRAM down down

KWCHSW40#sh ip access-lists
KWCHSW40#

 

Highlighted
Hall of Fame Guru

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Just to be clear - KWCHSW40 is the switch that you are not able to ping? If so please post the output of show arp on that switch. Might also be helpful to see output of these commands

show cdp neighbor

show interface trunk

show interface 

HTH

Rick
Highlighted
VIP Advocate

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Hi,

Everything seems correct. So I think it is better to provide both switches running configuration.

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution If this comment will make help you!
Highlighted
VIP Advocate

Re: devices connected to L2 switch cannot ping 2960 switches on VLAN 1.

Hi,

Is VLAN communication allowed between two switches means there is VLAN allowed on the uplink port?

Are you getting an IP address on the devices are connected to the 29xx switch?

Is the default gateway correct?

 

 

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution If this comment will make help you!
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