Difference between revisions of "Spanning tree configuration for Cisco switches"
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<yambe:breadcrumb self="Spanning tree configuration for Cisco switches">Switch configuration notes|Switch configuration notes</yambe:breadcrumb> | |||
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''Note: Here by user ports we mean all ports in access mode.'' | ''Note: Here by user ports we mean all ports in access mode.'' | ||
<yambe:breadcrumb self="Spanning tree configuration for Cisco switches">Switch configuration notes|Switch configuration notes</yambe:breadcrumb> | |||
Revision as of 05:58, 18 September 2018
<yambe:breadcrumb self="Spanning tree configuration for Cisco switches">Switch configuration notes|Switch configuration notes</yambe:breadcrumb>
Spanning-tree configuration for cisco switches
- Configure layer 3 switches as STP root
- Go to global configuration mode and use 'spanning-tree vlan <vlan_id> root primary'. Do this only for VLANs created in that switch (That is VLANs shown when you use 'show run')
- Configure user ports on 2912-2924 switch with portfast and bpdufilter
- Use following commands for each interface
- 'spanning-tree portfast'
- 'spanning-tree bpdufilter enable'
- Configure user ports on 2950+ switches with portfast, bpdufilter and bpduguard
- 'spanning-tree portfast'
- 'spanning-tree bpdufilter enable'
- 'spanning-tree bpduguard enable'
- Configure 2950+ switches to automatically recover from bpduguard after some fixed interval. That is, in global configuration mode use
- 'errdisable detect cause bpduguard'
- 'errdisable recovery interval 300'
- (Note: By default settings are same as being configured by above lines. Hence above lines will not appear in 'show run')
Note: Here by user ports we mean all ports in access mode.
<yambe:breadcrumb self="Spanning tree configuration for Cisco switches">Switch configuration notes|Switch configuration notes</yambe:breadcrumb>
