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04-29-2013 05:19 AM
04-29-2013 05:19 AM
Spanning-tree interoperability between HP and Cisco ?
On a site, I changed the Campus Core with an HP 10504. Many Cisco switches are still connected on the HP (some in daisy-chaining).
RPVST+ is configured on Cisco and RSTP on HP.
RPVST+ is per-vlan and RSTP is per-instance. Seems to be compatible but not sure.
I was wondering how the spanning-tree protocol deals with such a change.
[HP]dis stp root
MSTID Root Bridge ID ExtPathCost IntPathCost Root Port
0 4096.b8af-6763-e67e 0 0
HP is the root bridge for instance 0 (including vlan 1, 99). That's perfect
BUT.....on Cisco, the command "show spanning-tree vlan root' shows that the CISCO switch is the root bridge for vlan 99 except vlan 1.
CISCO#show spanning-tree root
Root Hello Max Fwd
Vlan Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
VLAN0001 4096 b8af.6763.e67e 4 2 20 15 Gi1/0/39
VLAN0099 8194 0025.8383.3400 0 2 20 15
Neither, the HP switch can become the Root Bridge for vlan 99.
Any idea ??? Should I migrate to PVST on HP ?
Herve
--------------
Another test on HP:
[HP] dis stp vlan 99
Error: Invalid STP Mode
[HP] dis stp vlan1
Error: Invalid STP Mode
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04-30-2013 01:30 AM
04-30-2013 01:30 AM
Re: Spanning-tree interoperability between HP and Cisco ?
Hi,
The HP comware switches (including the 105xx) support pvst, but not pvst+, so for failover times, it is probably best to stick with MSTP/RSTP on the HP side.
This is a doc about xSTP-PVST interop (based on procurve, but the logic applies to any vendor, including comware):
http://h10032.www1.hp.com/ctg/Manual/c02571903.pdf
Bottomline: Cisco will run standard STP on vlan 1 (native vlan), so this is the only one which will interact with the HP switches, HP switch will see the PVST packets as normal data packets in the user vlans.
Best regards,Peter.
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12-08-2020 07:16 AM
12-08-2020 07:16 AM
Re: Spanning-tree interoperability between HP and Cisco ?
Dear team,
I also have an issue with STP between HP and Cisco Switches.
On the CISCO Switch I am running PVSTP.
Does anybody know if HP switch 1810-24G J9803A supports PVSTP?
Many thanks
Oliver
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12-10-2020 02:58 PM
12-10-2020 02:58 PM
Re: Spanning-tree interoperability between HP and Cisco ?
Hi!
"Does anybody know if HP switch 1810-24G J9803A supports PVSTP?"
No, it doesn't. You HP 1810 doesn't support PVSTP implementation.
HP ProCurve 1810 Switch Series supports:
- IEEE 802.1D Spanning Tree Protocol (STP)
- IEEE 802.1W Rapid Spanning Tree Protocol (RSTP)
P.S.
Don't post on a 7 (Seven!) years old thread...not only because it's old but also because this thread was focused on STP interoperability between HP Comware OS based switches (your HP 1810 isn't Comware based) and Cisco. Better for you to open a whole new thread on the Switching and Routing -> Forum "Aruba and ProVision based" section and explain what is your scenario and your issue.
I'm not an HPE Employee