MLAG + Rapid Spanning Tree(RSTP) - 2 -
概要
前回の続きでMLAG + RSTP環境で気になることを色々試してみます。
MLAG間でPriorityが異なる場合は?
SN2010-1がMasterの時にMaster側のPriorityを0に設定してみる。
SN2010-1 [mlag-domain: master] (config) # spanning-tree priority 0
SN2010-1のMpo1、Mpo2がDiscardingのままとなり、正常な状態に遷移しないままとなった。他のスイッチに関してはRoot Bridgeは以前のままの状態。
SN2010-1 [mlag-domain: master] (config) # show spanning-tree Switch : ethernet-default Spanning tree protocol rst : enabled Spanning tree force version: 2 Root ID: Priority : 0 Address : 00:00:5e:00:01:5d Bridge root : yes Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 Bridge ID: Priority : 0 Address : 00:00:5e:00:01:5d Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 L: Loop Inconsistent R: Root Inconsistent G: BPDU Guard Inconsistent -------------------------------------------------------------------------- Interface Role Sts Cost Prio Type -------------------------------------------------------------------------- Mpo1 Designated Discarding 1000 128 normal Mpo2 Designated Discarding 1000 128 normal Po1000 Designated Forwarding 100 128 edge
SN2010-2 [mlag-domain: standby] # show spanning-tree Switch : ethernet-default Spanning tree protocol rst : enabled Spanning tree force version: 2 Root ID: Priority : 0 Address : 50:6b:4b:8e:92:c0 Cost : 1000 Port : Mpo1 Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 Bridge ID: Priority : 8192 Address : 00:00:5e:00:01:5d Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 L: Loop Inconsistent R: Root Inconsistent G: BPDU Guard Inconsistent -------------------------------------------------------------------------- Interface Role Sts Cost Prio Type -------------------------------------------------------------------------- Mpo1 Root Forwarding 1000 128 normal Mpo2 Alternate Discarding 1000 128 normal Po1000 Designated Forwarding 100 128 edge
SN2010-3 [standalone: master] # show spanning-tree Switch : ethernet-default Spanning tree protocol rst : enabled Spanning tree force version: 2 Root ID: Priority : 0 Address : 50:6b:4b:8e:92:c0 Bridge root : yes Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 Bridge ID: Priority : 0 Address : 50:6b:4b:8e:92:c0 Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 L: Loop Inconsistent R: Root Inconsistent G: BPDU Guard Inconsistent -------------------------------------------------------------------------- Interface Role Sts Cost Prio Type -------------------------------------------------------------------------- Eth1/22 Designated Forwarding 200 128 normal Po1 Designated Forwarding 1000 128 normal
SN2010-4 [standalone: master] # show spanning-tree Switch : ethernet-default Spanning tree protocol rst : enabled Spanning tree force version: 2 Root ID: Priority : 0 Address : 50:6b:4b:8e:92:c0 Cost : 200 Port : Eth1/22 Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 Bridge ID: Priority : 4096 Address : 50:6b:4b:8e:95:c0 Hello Time (sec) : 2 Max Age (sec) : 20 Forward Delay (sec): 15 L: Loop Inconsistent R: Root Inconsistent G: BPDU Guard Inconsistent -------------------------------------------------------------------------- Interface Role Sts Cost Prio Type -------------------------------------------------------------------------- Eth1/22 Root Forwarding 200 128 normal Po1 Designated Forwarding 1000 128 normal