CE6856 MLAG configure per vlan STP with Cisco

chenhui · Created Nov 29, 2019 07:34:04

Posted by WesKerT at 2019-11-27 14:28 Thanks for your reply.The current issue is that I cannot exchange the spanning tree info/bdpu with C ...

From the result of the show spanning tree command on the Cisco switch, interface Po10 detects the BPDU packets forwarded by Cisco switch itself, could you please provide the configuration of the interface G0/1 and Po10 on the Cisco switch.

chenhui · Created Nov 27, 2019 07:15:54

@WesKerT

are you in situation as the picture below shows?

M-LAG

WesKerT · Created Nov 27, 2019 07:26:01

Yes.

(Sorry, I created similar content on other post.)

chenhui · Created Nov 27, 2019 07:55:25

Posted by WesKerT at 2019-11-27 07:26 Yes.(Sorry, I created similar content on other post.)

please check https://support.huawei.com/hedex/hdx.do?docid=EDOC1100020548&id=EN-US_TASK_0138784599&lang=en

By the way, I think there is an example might help you https://support.huawei.com/hedex/hdx.do?docid=EDOC1100020548&id=dc_cfg_eth-trunk_0086&lang=en

Please let me know, if these materials helpful.

WesKerT · Created Nov 27, 2019 08:47:42

I have tried most of the STP configuration from much documents, but does not find any configuration is working with pvst.

Only MSTP on Cisco and Huawei can operate with default instance 0.

I followed second link to configure in Huawei (RSTP and V-STP), then Cisco configure PVST, it will block Huawei ports.

Huawei Configs:

stp bridge-address 0000-5e39-0039

stp mode rstp

stp v-stp enable

stp instance 0 priority 4096

#

interface Eth-Trunk10

description Link to L2

port link-type trunk

stp edged-port enable

mode lacp-static

dfs-group 1 m-lag 1

#

interface Eth-Trunk10.218020 mode l2

encapsulation dot1q vid 20

bridge-domain 218020

#

interface Eth-Trunk126

description Link to MLAG

mode lacp-static

peer-link 1

Cisco show spanning tree:

Interface Role Sts Cost Prio.Nbr Type

------------------- ---- --- --------- -------- --------------------------------

Gi0/1 Desg FWD 19 128.1 P2p Edge

Po10 Desg BLK 3 128.136 P2p self-looped

chenhui · Created Nov 27, 2019 08:49:16

@WesKerT if the interface on Huawei switch is block, how about lower down the root priority on Cisco switch, so that the Huawei switch could be selected as the root bridge?

WesKerT · Created Nov 27, 2019 09:03:08

The cisco Switch priority is in 32768 already.

lubna · Created Nov 27, 2019 11:34:44

spanning tree protocol probplem

Hi''

my be this image solve your problem

WesKerT · Created Nov 27, 2019 14:28:38

Thanks for your reply.

The current issue is that I cannot exchange the spanning tree info/bdpu with Cisco.
I have figured out 2 problems.

1. If there is single Cisco SW(Rapid-PVST) and single Huawei SW(VBST).
Both SW are thinking they are root bridge, the traffic cannot forward.
In Huawei switch, I enter display stp vlan info br
It cannot see vlan 20 and 30 information.
Huawei:
stp vlan 20 30 priority 8192
#
vlan batch 20 30
#
stp bridge-address 0000-5e39-0039
stp mode vbst
#

2. When I configure two Huawei SWes with MLAG, each SW connect a single link to Cisco SW as MLAG eth-trunk.
Huawei SWes using RSTP with v-stp, Cisco using PVST.
Huawei and Cisco SW still cannot communicate.
Just like #5 post, the port is blocked and have self-loop shown in Cisco SW.

chenhui · Created Nov 29, 2019 07:19:56

Posted by WesKerT at 2019-11-27 14:28 Thanks for your reply.The current issue is that I cannot exchange the spanning tree info/bdpu with C ...

From you configuration, I draw a simple topology, could you please confirm if am I right

interconnection

Enterprise

Consumer

Corporate

Carriers

CE6856 MLAG configure per vlan STP with Cisco

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