Alcatel Unleashed

Hello,

I have one 6400 which is interconnected with our partner (another isp) hp 5xxx chassis. SOme days ago i got a call from our partners engineer, and he said, that spanningtree is blocking our port all day long. Then we made one test with another partner and we were blocked.
Our-coure(c3560)----Partner1(hp)----we(6400)----Partner2(laptop)
So, when we activated a new vlan from partner2 laptop to our core cisco we got blocked (os6400) at all on the partners 1 HP switch.
Here is some parts from my os6400

bridge mode 1х1
vlan 4012 802.1q 1/24 "Uplink"

# show vlan port 1/24
vlan type status
--------+---------+--------------
1 default forwarding
4012 qtagged forwarding

#show vlan 4012
Name : uplink,
Administrative State: enabled,
Operational State : enabled,
1x1 Spanning Tree State : enabled,
Flat Spanning Tree State : enabled,
Authentication : disabled,
IP Router Port : on,
IPX Router Port : none,
Mobile Tag : off,
Source Learning : enabled

#show spantree
Spanning Tree Path Cost Mode : AUTO
Vlan STP Status Protocol Priority
-----+----------+--------+--------------
1 ON RSTP 32768 (0x8000)
761 ON RSTP 32768 (0x8000)
4012 ON RSTP 32768 (0x8000)

vlan 4012 802.1q 1/24 "Uplink"

I heard something that for interconnecting is beter bridge mode flat.
Any ideas and recomendations?

Hello

1*1 is ALU protocol.

If HP understand PVST+ you can use this on port wich interconnect hp and 6400.
so still in 1*1
and on port hp - 6400 configure pvst+, so hp will understand bpdu for multiple vlans.

or use flat mode evrywhere.

Cedric

Hello,

Thanks for the reply! Yeah, i already switched to the flat mode. HP does not support any sort of PVST, it runs in per port mode.

so you solve your issue ?