[c-nsp] Catalyst 2950G Trunking Issue
Juan C. Crespo R.
jcposeidon at cantv.net
Tue Mar 27 09:01:26 EST 2007
SWITCH-A#show interfaces gigabitEthernet 0/1 trunk
>
> Port Mode Encapsulation Status Native vlan
> Gi0/1 on 802.1q trunking 1
>
> Port Vlans allowed on trunk
> Gi0/1 1,10-25,354,456,845
>
> Port Vlans allowed and active in management domain
> Gi0/1 1
>
> Port Vlans in spanning tree forwarding state and not pruned
> Gi0/1 1
>
>
> SWITCH-A#show interfaces vlan 1
> Vlan1 is up, line protocol is up
> Hardware is CPU Interface, address is 03b0.24b1.5180 (bia
> 03b0.24b1.5180)
> Internet address is 10.0.0.1/24
> MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
> reliability 255/255, txload 1/255, rxload 1/255
> Encapsulation ARPA, loopback not set
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input never, output never, output hang never
> Last clearing of "show interface" counters never
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> 5 minute input rate 0 bits/sec, 0 packets/sec
> 5 minute output rate 0 bits/sec, 0 packets/sec
> 25 packets input, 3264 bytes, 0 no buffer
> Received 0 broadcasts (0 IP multicast)
> 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 164 packets output, 0 bytes, 0 underruns
> 0 output errors, 4 interface resets
> 0 output buffer failures, 0 output buffers swapped out
>
> SWITCH-A# show arp
> Protocol Address Age (min) Hardware Addr Type Interface
> Internet 10.0.0.1 - 03b0.24b1.5180 ARPA Vlan1
>
>
> SWITCH-B#show interfaces gigabitEthernet 0/1 trunk
>
> Port Mode Encapsulation Status Native vlan
> Gi0/1 on 802.1q trunking 1
>
> Port Vlans allowed on trunk
> Gi0/1 1,10-25,354,456,845
>
> Port Vlans allowed and active in management domain
> Gi0/1 1
>
> Port Vlans in spanning tree forwarding state and not pruned
> Gi0/1 1
>
>
> SWITCH-B#show interfaces vlan 1
> Vlan1 is up, line protocol is up
> Hardware is CPU Interface, address is 03b2.24b1.5180 (bia
> 03b2.24b1.5180)
> Internet address is 10.0.0.2/24
> MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
> reliability 255/255, txload 1/255, rxload 1/255
> Encapsulation ARPA, loopback not set
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input never, output never, output hang never
> Last clearing of "show interface" counters never
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> 5 minute input rate 0 bits/sec, 0 packets/sec
> 5 minute output rate 0 bits/sec, 0 packets/sec
> 210 packets input, 15072 bytes, 0 no buffer
> Received 0 broadcasts (0 IP multicast)
> 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 34 packets output, 0 bytes, 0 underruns
> 0 output errors, 4 interface resets
> 0 output buffer failures, 0 output buffers swapped out
>
> SWITCH-B# show arp
> Protocol Address Age (min) Hardware Addr Type Interface
> Internet 10.0.0.2 - 03b2.24b1.5180 ARPA Vlan1
>
>
>
> SWITCH-B#ping 10.0.0.1
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
> .....
> Success rate is 0 percent (0/5)
>
>
>
> SWITCH-A#ping 10.0.0.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
> .....
> Success rate is 0 percent (0/5)
> SWITCH-A#
>
> Thanks..
>
> Michael K. Smith - Adhost escribió:
>> Hello:
>>
>>
>>> -----Original Message-----
>>> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
>>> bounces at puck.nether.net] On Behalf Of Juan C. Crespo R.
>>> Sent: Sunday, March 25, 2007 1:51 PM
>>> To: saso pirnat
>>> Cc: cisco-nsp at puck.nether.net
>>> Subject: Re: [c-nsp] Catalyst 2950G Trunking Issue
>>>
>>> Well, It works the Device connected to the VLans ports works Ok, but
>>> the
>>> interface Vlan 1 on Catalyst A cannot see the interface Vlan 1 on
>>> Catalyst B.
>>>
>>> Any Idea?? :-(
>>>
>>> saso pirnat escribió:
>>>
>>>> dalton wrote:
>>>>
>>>>
>>>>> is the trunk showing up?
>>>>>
>>>>> Make sure its a crossover cable connecting them as well.
>>>>>
>>>>> repost your config, it didn't come through.
>>>>>
>>>>> -dalton
>>>>>
>>>>> On Fri, Mar 16, 2007 at 11:44:54AM -0400, Juan C. Crespo R. wrote:
>>>>>
>>>>>
>>>>>> Hi Dears
>>>>>>
>>>>>> I'm getting problems trunking two Catalyst 2950G, I try a lot of
>>>>>>
>>> things
>>>
>>>>>> and I can't make it works. the VLAN 1 on both sides, can't make
>>>>>>
>>> ping
>>>
>>>>>> each other, and neither Telnet or SSH, Anyone could send me a
>>>>>>
>>> config
>>>
>>>>>> examples about trunking on two 2950G?
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> this is my config
>>>>>>
>>>>>> _______________________________________________
>>>>>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>>>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>>>>
>>>>>>
>>>>> _______________________________________________
>>>>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>>>
>>>>>
>>>> You should specify which vlans are allowed in trunk:
>>>>
>>>> interface GigabitEthernet2/3
>>>> switchport trunk encapsulation dot1q
>>>> switchport trunk allowed vlan 1,10-25,354,456,845
>>>> switchport mode trunk
>>>> mls qos trust dscp
>>>>
>>
>> Could you post the configuration for both sides of the trunk? You may also want to include:
>>
>> - show int <whatever> trunk (on both)
>> - show int vlan 1 (on both)
>> - show are (on both)
>>
>> Mike
>>
>>
>>
>>
More information about the cisco-nsp
mailing list