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тАО06-29-2007 11:41 PM
тАО06-29-2007 11:41 PM
MSTP question
I have configured a network with two core-switches and some edge-switches. I configured MSTP like so:
spanning-tree
spanning-tree config-name "XXXXX"
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1 2 4 10 12 20 30 50
spanning-tree instance 1 priority 1
spanning-tree instance 2 vlan 6-9 11 13 21 31 51
spanning-tree instance 2 priority 2
on the edge switches I configured like so:
spanning-tree
spanning-tree config-name "XXXXX"
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1 2 4 10 12 20 30 50
spanning-tree instance 2 vlan 6-9 11 13 21 31 51
But when I do a show spanning-tree on the edge-switches I get this:
XXXXXS1# sh spanning-tree mst-config
MST Configuration Identifier Information
MST Configuration Name : XXXXX
MST Configuration Revision : 1
MST Configuration Digest : 0x4A7DD153CAAAB5585B49E9078CB3DC15
IST Mapped VLANs :
Instance ID Mapped VLANs
----------- ---------------------------------------------------------
1
2
Is that normal, because I would have expected to see the vlan's somewhere...
spanning-tree
spanning-tree config-name "XXXXX"
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1 2 4 10 12 20 30 50
spanning-tree instance 1 priority 1
spanning-tree instance 2 vlan 6-9 11 13 21 31 51
spanning-tree instance 2 priority 2
on the edge switches I configured like so:
spanning-tree
spanning-tree config-name "XXXXX"
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1 2 4 10 12 20 30 50
spanning-tree instance 2 vlan 6-9 11 13 21 31 51
But when I do a show spanning-tree on the edge-switches I get this:
XXXXXS1# sh spanning-tree mst-config
MST Configuration Identifier Information
MST Configuration Name : XXXXX
MST Configuration Revision : 1
MST Configuration Digest : 0x4A7DD153CAAAB5585B49E9078CB3DC15
IST Mapped VLANs :
Instance ID Mapped VLANs
----------- ---------------------------------------------------------
1
2
Is that normal, because I would have expected to see the vlan's somewhere...
3 REPLIES 3
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тАО06-30-2007 03:56 PM
тАО06-30-2007 03:56 PM
Re: MSTP question
Hi
If you configured Core1 with priority 1 for instance 1 and priority 2 for instance 2
Then make sure that Core2 has priority 2 for instance 1 and priority 1 for instance 2.
Then check the following on both core switches
Core1(config)#show spanning-tree instance 1
and you should get (this switch is the root)
Core2(config)#show spanning-tree instance 2
and you should get (this switch is the root)
Then check:
Edge(config)#show spanning-tree instance 1
and you should get the MAC address of Core1 as the root.
Edge(config)#show spanning-tree instance 2
and you should get the MAC address of Core2 as the root.
Good Luck !!!
If you configured Core1 with priority 1 for instance 1 and priority 2 for instance 2
Then make sure that Core2 has priority 2 for instance 1 and priority 1 for instance 2.
Then check the following on both core switches
Core1(config)#show spanning-tree instance 1
and you should get (this switch is the root)
Core2(config)#show spanning-tree instance 2
and you should get (this switch is the root)
Then check:
Edge(config)#show spanning-tree instance 1
and you should get the MAC address of Core1 as the root.
Edge(config)#show spanning-tree instance 2
and you should get the MAC address of Core2 as the root.
Good Luck !!!
Science for Everyone
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тАО06-30-2007 08:33 PM
тАО06-30-2007 08:33 PM
Re: MSTP question
That looks to be a display bug I'd say. I can't remember off the top of my head, but does it show the mapped VLANs with a 'show span instance 1' etc?
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тАО07-01-2007 02:16 PM
тАО07-01-2007 02:16 PM
Re: MSTP question
What are your edge switches and what firmware are you running? I've quickly tested this on a few and it's showing up fine.
Make sure you're running the latest firmware if you haven't done so already.
Make sure you're running the latest firmware if you haven't done so already.
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