Can not ping to My 3560 Switch form 2960

Answered Question
Aug 28th, 2010

Hi

I am having a strange problem to ping 3560 Switch from my 2960 Switch. Few Days earlier it was working. Both the Switches are having trunk. At my 2960 Switch can only Ping his Valn 1 Ip address. 2560 can not ping 2960 but can ping other network switches and router.

Can you guys help me what is the reason behind this...

I have this problem too.
0 votes
Correct Answer by Nagaraja Thanthry about 6 years 3 months ago

Hello,

The two switches are on different IP subnets.

On 3560:

interface Vlan1

ip address 10.99.43.7 255.255.255.0

no ip route-cache

On 2960:

interface Vlan1

description "Management VLAN"

ip address 10.99.15.5 255.255.255.128

no ip route-cache

So, they cannot talk to each other. One way this could work is if you change

the subnet mask to /16 i.e. 255.255.0.0.

Hope this helps.

Regards,

NT

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Overall Rating: 5 (1 ratings)
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Hitesh Vinzoda Sun, 08/29/2010 - 03:10

Hi,

Try adding default gateway on 2960

ip default-gateway x.x.x.x

HTH

Hitesh Vinzoda

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Nagaraja Thanthry Sun, 08/29/2010 - 07:59

Hello,

Have you checked the trunk to see if you have enabled management vlan? It

would be a good idea to check the output of "show spanning-tree vlan

" command on both 3560 and 2960 and make sure that the

management vlan is in forwarding state on the trunk. Also, you need to check

to make sure that both are pointing to the same MAC address as the

spanning-tree root. My guess is that for some reason, the trunk may not be

allowing the management vlan traffic.

Regards,

NT

rowin_rollwu Sun, 08/29/2010 - 09:07

Hi,

Can you provide more detailed information?
Such as configuration or debug information (debug ip packets)

Regards,

Feng Luo

Correct Answer
Nagaraja Thanthry Sun, 08/29/2010 - 20:36

Hello,

The two switches are on different IP subnets.

On 3560:

interface Vlan1

ip address 10.99.43.7 255.255.255.0

no ip route-cache

On 2960:

interface Vlan1

description "Management VLAN"

ip address 10.99.15.5 255.255.255.128

no ip route-cache

So, they cannot talk to each other. One way this could work is if you change

the subnet mask to /16 i.e. 255.255.0.0.

Hope this helps.

Regards,

NT

Md. Sultan Al Arif Sun, 08/29/2010 - 20:55

Hi Nagraja

Thanks for the post. Last few days its worked here with this configuration. I will chnage my Subnet.

Best Regards

Sultan Al Arif

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