03-08-2007 11:01 PM - edited 03-05-2019 02:47 PM
I have DLSWitchA = Cat 3550.
ALSwitchA1 and ALSwitchA2 are Cat 2912 connected via crossover cable to Cat 3550 ports fa0/1 and fa0/2 respectively.
Then I configured the port on the cat 3550 as
int fa0/1
switchport encap dot1q
switchport trunk
Then I go to my cat 2912, and I make it as a vtp client, I put 'vtp domain mynameasCat3550'.
Then I do #show vlan on my C2912, but I see that there is no vlan info propagated from the vtp server.
I noticed that on my ALSwitch (Cat 2912), the trunk negotiation=disabled. So far I have been researching how I should adjust this on the c2912 to "on" but I can't find the command. Please advise.
Output from Cat 3550
DLSwitchA#show int fa0/1 switchport
Name: Fa0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
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
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
DLSwitchA#
DLSwitchA#
Output from Cat 2912
ALSwitchA2#show int fa0/1 switchport
Name: Fa0/1
Switchport: Enabled
Administrative mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Disabled
Access Mode VLAN: 0 ((Inactive))
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 1,10,20
Pruning VLANs Enabled: 2-1001
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
03-08-2007 11:14 PM
Hi,
The link errors, please check your duplex and speed settings again on your trunks, possibly hard code them. Post the show interface output.
In some command outputs, *-inconsistent STP state is referred to as ?broken.?
HTH
Hoogen
03-08-2007 11:38 PM
Please see that I updated my message after submitting it; I did 'show int fa0/1 switchport' and I noticed that the trunk negotiation=disabled on the cat 2912. On the cat 3550 is set to 'on'.
Can you please tell me whether the negotiation is the problem and how I can issue the command to adjust this on my cat 2912? I can't find that sucker command.
Find below result of the show int fa0/1 on both switches just in case. It seems that the duplex settings and speed are OK.
ALSwitchA2#show int fa0/1
FastEthernet0/1 is up, line protocol is up
Hardware is Fast Ethernet, address is 0004.c09e.ad01 (bia 0004.c09e.ad01)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Auto-duplex (Full), Auto Speed (100), 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:20, output 00:00:01, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1772 packets input, 160645 bytes
Received 1281 broadcasts, 0 runts, 0 giants, 0 throttles
86 input errors, 86 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1276 multicast
0 input packets with dribble condition detected
7215 packets output, 268984 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 output buffer failures, 0 output buffers swapped out
ALSwitchA2#show int fa0/1
FastEthernet0/1 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0011.2192.3681 (bia 0011.2192.3681)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:09, 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 1000 bits/sec, 2 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
2690 packets input, 240001 bytes, 0 no buffer
Received 2690 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 2684 multicast, 0 pause input
0 input packets with dribble condition detected
6876 packets output, 511782 bytes, 0 underruns
--More--
03-08-2007 11:46 PM
Hey never mind. I see that the vlans are being propagated to the cat 2912 vtp client just OK now in spite of the trunk mode=disabled on the cat 2912. Interesting...
Thanks again and sorry for my mistakes. The initial problem is that the trunk was set to 'isl' on the cat 2912 and 'do1q' on the cat 3550.
03-09-2007 01:43 AM
a recomendation is that if u'll use the port as trunkports just hardcode them as trunk and disable the negociation proces to reduce overhead.
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