Issue with 2960

[Arun]

i have a device connected to 2960 switch. It is an access port and i could ping the device from other switches , also from outside the lan. But i am not able to ping the device from 2960 switch alone. I suspected and checked the arp table and it was showing as incomplete. I created the manual arp entry and tried pinging but no luck.

please help me to resolve this issue..

Thanks,

Arun

[Reza Sharifi]

Can you post "sh run" from the switch?

Also, what port on the switch is connected to this device?

[Arun]

Have attached running-config. Device is connected to port gi0/13

Thanks,

Arun

[sajid_m123]

What is the IP address of destination machine?

[nickbonifacio]

Hi Arun!

Can you do:

sh int g0/13 status

sh span int g0/13

sh vlan bri

and paste it here?

Thanks!

Nick Bonifacio
CCIE #38473

[Arun]

sh int g0/13 status

Port      Name               Status       Vlan       Duplex  Speed Type
Gi0/13    IN-WINDOW 2        connected    1          a-full a-1000 10/100/1000BaseTX

sh span int g0/13

Mst Instance        Role Sts Cost      Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
MST0                Desg FWD 20000     128.13   P2p Edge
MST1                Desg FWD 20000     128.13   P2p Edge

sh vlan bri

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1  active Gi0/2, Gi0/4, Gi0/5, Gi0/6
   Gi0/9, Gi0/10, Gi0/11, Gi0/12
   Gi0/13, Gi0/14, Gi0/15, Gi0/16
   Gi0/17, Gi0/19, Gi0/20, Gi0/25
   Gi0/26, Gi0/28, Gi0/29, Gi0/34
   Gi0/43, Gi0/44, Gi0/48
2  active
3  active
4  active
5  active
6  active
7  active Gi0/3, Gi0/7, Gi0/21, Gi0/22
   Gi0/23, Gi0/24
9  active
10  active
16  active
20  active Gi0/33
21  active Gi0/27, Gi0/37, Gi0/38, Gi0/39
   Gi0/40, Gi0/41, Gi0/42
22  active Gi0/18
23  active
  
VLAN  Status Ports
----  --------- -------------------------------
24  active
27  active
29  active
31  active Gi0/35, Gi0/36
37  active
39  active
40  active
50  active
52  active
53  active
55  active
56  active Gi0/32
58  active
60  active
61  active
62  active
101  active
102  active
239  active
1002  act/unsup

[TPaine]

Confirm vlan1 is not shutdown.  I don't recall the default behaviour on a 2960, but it may be the vlan1 SVI is shutdown by default.  Try

conf t

int vlan1

  no shut

[Arun]

vlan 1 is up and running

[sajid_m123]

Source & destnation are on same subnet?

Can you ping other devices in the same subnet from this switch?

[Arun]

yes, they are on the same subnet. i can ping other devices in the same subnet from the switch..

[acampbell]

Arun,

Can you try enabling Ip routing on the switch.

!
no ip default-gateway 10.x.x.70
!
ip routing
!
ip route 0.0.0.0 0.0.0.0 10.x.x.70
!
int vlan 1
no ip proxy-arp
!

Retest

Regards,
Alex.
Please rate useful posts.

[mfurnival]

Could it be an incorrect subnet mask on the host? You did not confirm the IP address of the PC you cannot ping.

Can you also post the output from:

#show mac add | i 0/13

[Arun]

i verified the port and it is learning the mac-address. yes i need to check subnet mask on the device. But i just wonder how incorrect subnet mask creates this issue. could you pls explain

[glen.grant]

  I assume on this device you have verified  any firewalls on the pc have been turned off .

[TPaine]

Your subnet mask is what is used to determine if the (layer 3) destination address is on the same subnet or not.  If it is not, then any reply would be set to your router's MAC (layer 2) destination address, assuming you have a route entry to match.  I too would suspect this is simply a configuration issue or personal firewall like Glen mentioned.

subnet masks are a string of 1's, starting from the most significant bit to least significant bit (which defines your network size).  You perform a bitwise AND operation between your destination IP address and mask.  If the result matches your source network, then they are on the same subnet.  If not, you have to find the most explicit match in your routing table to determine the next hop address.