Hi,
Please i need help suddenly we removed the internet uplink from the core switch and connected still showing in blocking mode and it is not going to forwarding mode
internet uplink Port showing blocking state
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Re: internet uplink Port showing blocking state
Any urgent help is appreciated
Re: internet uplink Port showing blocking state
blocked by spanning tree after reconnection of the same link like before? Did I understand correctly?
if the link is connected, do the following outputs:
> show spantree port active
> show spantree vlan xx (vlan of the uplink)
> show spantree cist
If you are sure that there isn't any loop than you can disable stp at the uplink port.
Or is it an other problem? try
> interface x/x/x admin-state disable/enable
regards
Silvio
if the link is connected, do the following outputs:
> show spantree port active
> show spantree vlan xx (vlan of the uplink)
> show spantree cist
If you are sure that there isn't any loop than you can disable stp at the uplink port.
Or is it an other problem? try
> interface x/x/x admin-state disable/enable
regards
Silvio
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Re: internet uplink Port showing blocking state
I have created the vlans for clients and tagged all the vlans in all ports especially in 1/1/14 where the DHCP server up-link is connected
Clients will get IP from DHCP server(ANTlABS-3rd party server) connected to 6450
Network topology:
6450(1/26)-----------(1/1/14)6900---------(1/49)6450
I have attached configuration on 6900 and the vlans i created 1701-1747 it was showing port blocking for those vlans
Earlier the setup was in per vlan mode but i have created more than 252 vlans so Per vlan mode will not work and therefore i changed to Flat mode
and i have created the vlan 1701-1747 also so many created but if i enable the span-tree admin state then port is showing blocking for that vlans
What could be the issue ?
Clients will get IP from DHCP server(ANTlABS-3rd party server) connected to 6450
Network topology:
6450(1/26)-----------(1/1/14)6900---------(1/49)6450
I have attached configuration on 6900 and the vlans i created 1701-1747 it was showing port blocking for those vlans
Earlier the setup was in per vlan mode but i have created more than 252 vlans so Per vlan mode will not work and therefore i changed to Flat mode
and i have created the vlan 1701-1747 also so many created but if i enable the span-tree admin state then port is showing blocking for that vlans
What could be the issue ?
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Re: internet uplink Port showing blocking state
I'm not going to analyze 2500 lines of config.... some comments:
- you seem to have a wild mix of stp enabled and disabled for several vlans,
- you use telnet,
- you use static agg,
- you disable vlan 1 (which afaik has created issues in the past).
Do you really need all vlans to the DHCP? why not dhcp-relay?
Just to note: with flat mode you have one stp instance, that means only one tree. if you have a secondary port/path between two switches (even with different vlans) at the end only one path will be unblocked (regardless of which vlans will be on the port)
- you seem to have a wild mix of stp enabled and disabled for several vlans,
- you use telnet,
- you use static agg,
- you disable vlan 1 (which afaik has created issues in the past).
Do you really need all vlans to the DHCP? why not dhcp-relay?
Just to note: with flat mode you have one stp instance, that means only one tree. if you have a secondary port/path between two switches (even with different vlans) at the end only one path will be unblocked (regardless of which vlans will be on the port)
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Re: internet uplink Port showing blocking state
Thanks Devnull fro your reply