Forum Discussion
CirrusSTP issue with Nexus 5548
NimbostratusAssuming that you haven't configured the priority on the root switch for VLAN 201, you can try this (in config mode):
- non-root switch: spanning-tree vlan 201 priority 40960
- Nexus switch: spanning-tree vlan 201 priority 36864
satish_txt_2254I have priority set on c3850 switch that's is why it's root bridge and second c3850 is sencandary root bridge.
This is not an issue about root bridge, it's about STP failover.. even I sent very high cost on 2G link my STP doesn't getting switch to 10G.. you can see in output.
- satish_txt_2254
Should I run F5 is passthrough mode? We are using PVSTP+ ?
F5 has very poor documents related it.
- satish_txt_2254
No one has answer ???
- satish_txt_2254
????? no answer
- crengifo_232216
Since F5 is configured in passthrough mode, practically it is transparent for the STP (it is like your etherchannel is directly connected to the 10G link... odd...)
Change to RSTP mode in the F5.
- satish_txt_2254
Unfortunately i have tried (RSTP, MSTP, STP etc) everything and no luck, Problem is Cisco switches running on Rapid-PVSTP+ and F5 doesn't understand this protocol.
In transparent mode 2G link turn into ACTIVE instead of 10G but when i try to shutdown 2G link 10G goes into loop-guard and switch never bring that port up.
In Lab i configure MSTP on cisco switch and MSTP on F5 in that case everything was working great.
Bottom line is F5 never work with PVSTP spanning-tree, if anyone did or hack something please let me know i really want that solution.
