3500 and 2950

[maisoque]

I am trying to connect a new 2950 on the network. I have the gateway , vlan and trunk mode setup I am not able to make it work. When I run the show cdp neigh command on the new (2950) switch I don't see the 3500, and 3500 also doesn't see the 2950. Does it mean that I have bad connection? I have replaced the gbic and the cables and made no difference.
The fastethernet has no ip address and I also don't know how to remove it.

I appreciate any help available

 

[IPKONFIG]

Do you have a connection light on the ports that connect your switches together? If you do, make sure CDP is turned on your 3550. You can turn it on by using the command "cdp enable" It's a global command and should turn in on for all interfaces. Let me know.

"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts

 

[maisoque]

I have the connection light on the ports that connects the switches together. And the cdp is running on the 3550, I can see other devices connecting to it and I also ran show cdp run and it is enabled.

Thanks for your reply

 

[maisoque]

Does the trunk encapsulation affect my problem?? The 3550 is set to ISL.

863#show inter giga 0/1 switchport
Name: Gi0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL

Protected: false

Voice VLAN: none (Inactive)
Appliance trust: none

 

[IPKONFIG]

Ok...Is your trunk configured for DOT1Q on both switches? or ISL? Either way, they need to be the same on both ends. Once this is done, then as a rule of thumb, you want to make sure that both are on the same native vlan. I'd use vlan 1 (default) until you're sure that they are talking like they should. Can you post the "show port" or "show run int fax/x" command for the connection between the two switches?

"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts

 

[maisoque]

How can I set ISL for the 2950?

This is the 3550:
8_2>show inter gi0/2
GigabitEthernet0/2 is up, line protocol is up
Hardware is Gigabit Ethernet, address is 0005.dd41.1932 (bia 0005.dd41.1932)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Auto-duplex (Full), 1000Mb/s, media type is CX_GIGASTACK
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
GigaStack module(0.2) in GBIC slot. link1 is up, link2 is down
Last input 4w0d, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 0 packets/sec
5 minute output rate 6000 bits/sec, 8 packets/sec
266038 packets input, 493895496 bytes, 0 no buffer
Received 166631 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 166628 multicast, 0 pause input
61229998 packets output, 3200703596 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

And this is the 2950:

863#show int gi0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 000c.ce2d.fb99 (bia 000c.ce2d.fb99)
MTU 1500 bytes, BW 1000000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
Link type is autonegotiation, media type is CX Gigastack
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
GigaStack module(0.2) in GBIC slot. link1 is up, link2 is down
Last input never, output 00:00:00, 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 ouxtput rate 0 bits/sec, 0 packets/sec
898889 packets input, 119864504 bytes, 0 no buffer
Received 898888 broadcasts, 0 runts, 0 giants, 0 throttles
14 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 898899 multicast, 0 pause input
0 input packets with dribble condition detected
168388 packets output, 11967578 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out

 

[maisoque]

How can I set ISL for the 2950?

This is the 3550:
8_2>show inter gi0/2
GigabitEthernet0/2 is up, line protocol is up
Hardware is Gigabit Ethernet, address is 0005.dd41.1932 (bia 0005.dd41.1932)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Auto-duplex (Full), 1000Mb/s, media type is CX_GIGASTACK
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
GigaStack module(0.2) in GBIC slot. link1 is up, link2 is down
Last input 4w0d, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 0 packets/sec
5 minute output rate 6000 bits/sec, 8 packets/sec
266038 packets input, 493895496 bytes, 0 no buffer
Received 166631 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 166628 multicast, 0 pause input
61229998 packets output, 3200703596 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

And this is the 2950:

863#show int gi0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 000c.ce2d.fb99 (bia 000c.ce2d.fb99)
MTU 1500 bytes, BW 1000000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
Link type is autonegotiation, media type is CX Gigastack
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
GigaStack module(0.2) in GBIC slot. link1 is up, link2 is down
Last input never, output 00:00:00, 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 ouxtput rate 0 bits/sec, 0 packets/sec
898889 packets input, 119864504 bytes, 0 no buffer
Received 898888 broadcasts, 0 runts, 0 giants, 0 throttles
14 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 898899 multicast, 0 pause input
0 input packets with dribble condition detected
168388 packets output, 11967578 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out


Thanks a lot

 

[IPKONFIG]

config t
interface gi0/1
switchport mode trunk
switchport trunk encapsulation isl
switchport trunk native vlan 1
end


Do the same thing on your 3550 and you should be set.


"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts

 

[maisoque]

But the 2590 doesn't seem to have this option. I got the following error message :

_3(config-if)#switchport trunk encapsulation isl
^
% Invalid input detected at '^' marker.

865_3rd_Flr_3(config-if)#switchport trunk ?
allowed Set allowed VLAN characteristics when interface is in trunking mode
native Set trunking native characteristics when interface is in trunking
mode
pruning Set pruning VLAN characteristics when interface is in trunking mode

Thanks again

 

[IPKONFIG]

Sorry, try

config t
interface gi0/1
switchport mode trunk


Try that one.

"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts

 

[maisoque]

Hi Ipkonfig,

It looks like the 2590 does not support ISL so I changed the 3550 to dot1q.

It is working now.

Thanks a lot,
MSOQ

 

[IPKONFIG]

Glad you got it working.

"I can picture a world without war. A world without hate. A world without fear. And I can picture us attacking that world, because they'd never expect it."
- Jack Handey, Deep Thoughts