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rstp Problem on hpe 1920g and some comnet industrial switches

snowblind1977
Occasional Visitor

rstp Problem on hpe 1920g and some comnet industrial switches

Hello,

I am going a bit crazy over a network, i have 2 hp 1920g poe switches, between them about 9 comnet industrial switches on two lines forming a loop, so i need rstp to work to open loop and keep redundancy active, if i assign on an hp the role ov root bridge the comnet seems to see it as root, but on hp ports i see a strange behaviour as here

----[Port25(GigabitEthernet1/0/25)][FORWARDING]----
 Port Protocol       :enabled
 Port Role           :CIST Designated Port
 Port Priority       :128
 Port Cost(Legacy)   :Config=auto / Active=20
 Desg. Bridge/Port   :32768.943f-c259-cc64 / 128.25
 Port Edged          :Config=enabled / Active=enabled
 Point-to-point      :Config=auto / Active=true
 Transmit Limit      :10 packets/hello-time
 Protection Type     :None
 MST BPDU Format     :Config=auto / Active=legacy
 Port Config-             
 Digest-Snooping     :disabled
 Rapid transition    :true
 Num of Vlans Mapped :1 
 PortTimes           :Hello 2s MaxAge 20s FwDly 15s MsgAge 1s RemHop 20
 BPDU Sent           :137303             
          TCN: 0, Config: 0, RST: 137303, MST: 0
 BPDU Received(Err)  :0(274244)            
          TCN: 0, Config: 0, RST: 0, MST: 0
    

 it seems the bpdu received from comnet is wrong for hp

do you have any suggestions to fix this?

thank you very much

2 REPLIES
Vince-Whirlwind
Honored Contributor

Re: rstp Problem on hpe 1920g and some comnet industrial switches

Do the non-HP switches have a variety of STP modes to choose from?

Have you tried changing the HP switches to use MST?

snowblind1977
Occasional Visitor

Re: rstp Problem on hpe 1920g and some comnet industrial switches

i will try to switch to mstp by the way commnet industrial has only rstp protocol or some proprietary ring protocols