01-02-2003 09:33 AM - edited 03-02-2019 03:53 AM
Hello all, I have set up a 3550 (SMI) switch on int gig0/1 as a 802.1q trunk . I left the trunk mode in the default mode of desirable auto. It plugs into a 4006 on slot 6/1 (SX multimode GBIC) which is also configured as a trunk mode on and ecap. dot1q. The VTP domain is configured w/ password and both are showing vtp advertisements. From the 3550 48 10/100 ports I have set switchport access vlan 50 which makes those 48 ports static-access ports correct ?? Anyway, I can plug in my laptop and go dhcp to that particular subnet range and successfully obtain an ip address on vlan 50 due to the fact that on the 4006 I have the ip helper-address pointing to that server, this works fine but the mgnt. IP address I put on the 3550 is in a different subnet and I can't ping or telnet to the 3550 from beyond the trunk. Does anyone know how I can fix this config to where I CAN ping and telnet to the mgnt. IP address on vlan 1 in the 3550 switch?
Here is a bit of the 3550 config.....
CCW-IDF#2-CSW1#show int gig0/1 switchport
Name: Gi0/1
Switchport: Enabled
Administrative Mode: dynamic desirable
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)
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Voice VLAN: none (Inactive)
Appliance trust: none
CCW-IDF#2-CSW1#
CW-IDF#2-CSW1#show int gig0/1 trunk
Port Mode Encapsulation Status Native vlan
Gi0/1 desirable 802.1q trunking 1
Port Vlans allowed on trunk
Gi0/1 1-4094
Port Vlans allowed and active in management domain
Gi0/1 1,48-55,80,220
Port Vlans in spanning tree forwarding state and not pruned
Gi0/1 1,48-55,80,220
CCW-IDF#2-CSW1#
Here is the capture from the 4006 slot 6/1 (SX GBIC)
CORE-A> (enable) show trunk 6/1
* - indicates vtp domain mismatch
Port Mode Encapsulation Status Native vlan
-------- ----------- ------------- ------------ -----------
6/1 on dot1q trunking 1
Port Vlans allowed on trunk
-------- ---------------------------------------------------------------------
6/1 1-1005
Port Vlans allowed and active in management domain
-------- ---------------------------------------------------------------------
6/1 1,48-55,80,220
Port Vlans in spanning tree forwarding state and not pruned
-------- ---------------------------------------------------------------------
6/1 1,48-55,80,220
CORE-A> (enable)
CORE-A> (enable) show port 6
Port Name Status Vlan Level Duplex Speed Type
----- ------------------ ---------- ---------- ------ ------ ----- ------------
6/1 connected trunk normal full 1000 1000BaseSX
Thanks in advance,
~ ZO
01-02-2003 09:59 AM
Zo
Make sure that you have at least 1 port configured and active in vlan 1 on both switches
01-02-2003 10:43 AM
I have int vlan 1 on the 3550 configured with the mgnt. IP address. Doesn't that mean that int vlan 1 IS in vlan 1?? The 4006 already meets this criterea.
01-02-2003 10:51 AM
a physical port must be assigned to that vlan
01-02-2003 10:54 AM
All right, I'll give it a shot and let you know how it goes. Thanks :-)
01-02-2003 09:51 PM
By the sound of things you have a L3 routing problem. I'm assuming that the mgnt IP addresses of both 4006 and 3550 are on the same subnet? If so then they should be able to ping each other. If not then you have trunking and VLANs allowed on trunk issue. You might also want to check that there is a default gateway/default router setup on your 3550. Since you're using SMI, I'm guessing that you'll need to setup only default gateway. BTW, if two switches can ping each other (using typically VLAN1) AND the 4006 is pingable from the PC (which is on a different subnet) BUT the 3550 is NOT pingable (from the PC) then most likely you have not setup a default gateway on it. Let me know how you go. Cheers
01-03-2003 05:19 AM
Yes, it was a routing problem. I figured it out yesterday. The mgnt. IP address on the 4006 was in a different VLAN (not vlan1). The thing that threw me off was that YES both the 3550 and the 4006 had 2 mngt IP's in the same subnet, but I didn't have it set up on vlan1 in the 4006. So at first glance I saw that both switches were configured with correct subnet IP's, but when I took a closer look I realized that I needed to go into the correct int vlan config mode and assign the correct vlan an IP in the same subnet. This kind of means that my VLAN 1 is not my TRUE mgnt vlan anymore. Is this bad?
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