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SS5300 MSTP configuration with cisco switch

Publication Date:  2017-06-27 Views:  2408 Downloads:  0
Issue Description

Customer want to configuration the MSTP In order to solve the two-layer loop issue, but customer both have the Huawei and Cisco switch so he configuration the MSTP but find it’s not working and all of the network effect.so customer disable the stp in the Huawei switch. Huawei switch is S5300 V200R005C00SPC300.


Customer topology as bellow:


Customer disable the stp in both two Huawei switch g0/0/4, Business temporarily back to normal.


Alarm Information

none

Handling Process

Firstcheck the configuration of MSTP both from the Huawei and Cisco switch. Find the pothcost is not same and the region-nameinstance is not also not match. Need change to same.

 

Huawei configuration about MSTP

 

stp region-configuration

 region-name HUAWEI-VSNL

 revision-level 20

 instance 1 vlan 224 1100 to 1299 1500 to 1899

 instance 2 vlan 3100 to 3549

 instance 3 vlan 246 to 247 3000 to 3099

 instance 4 vlan 2400 to 2999

 instance 5 vlan 3550 to 4000

 instance 6 vlan 1300 to 1499 1900 to 2399

 instance 7 vlan 400 to 999

 instance 8 vlan 2 to 223 225 to 245 248 to 399 1000 to 1099

 active region-configuration

#

 

Cisco configuration about MSTP

 

spanning-tree mode mst

spanning-tree extend system-id

!

spanning-tree mst configuration

 name VSNL

 revision 20

 instance 1 vlan 224, 1100-1299, 1500-1899

 instance 2 vlan 3100-3549

 instance 3 vlan 246-247, 3000-3099

 instance 4 vlan 2400-2999

 instance 5 vlan 3550-4000

 instance 6 vlan 1300-1499, 1900-2399

 instance 7 vlan 400-999

 instance 8 vlan 2-223, 225-245, 248-399, 1000-1099

 

Secondcheck the configuration about the Interconnection port configuration, suggest enable some optimization and enable the stp.

 

interface GigabitEthernet0/0/4

 description (Huawei_as01 connected to cisco_as04#GigabitEthernet 1/0/12)

 undo port hybrid vlan 1

 port hybrid tagged vlan 10 20 30 100 106 119 124 130 137 140 to 142

 port hybrid tagged vlan 146 150 152 221 224 246 to 247 256 262 265 267 to 268

 port hybrid tagged vlan 1100 1500 1504 1700 1900 2000 2500 2550 2600 2650

 port hybrid tagged vlan 3000 3002 to 3004 3006 to 3007 3025 3560 3566 3569

 stp disable

 stp root-protection

 

interface GigabitEthernet1/0/12

 description ***cisco_as04 connect to Huawei_as01-GigabitEthernet0/0/4***

 switchport trunk encapsulation dot1q

 switchport trunk allowed vlan 10,20,30,100,109,112,118,122,140,150,152,224,246

 switchport trunk allowed vlan add 247,256,260,268,1100-1109,1500-1509,1700

 switchport trunk allowed vlan add 1900-1909,2500,2550,2600,2650,3000-3009

 switchport mode trunk

Root Cause

FirstThe pathcost calculation method is different between huawei and cisco switch,cisco default use the spanning-tree pathcost method short. Mean cisco use IEEE 802.1d-1998 standard, but Huawei default use the IEEE 802.1t, so need to change to same.

 

SecondMSTP configuration about region-namerevision-levelinstance must be same ,Then MSTP can be Synchronize.

 

ThirdThere is no mechanism optimization from Interconnection port configuration

Solution

Change the configuration as bellow:

 

[Huawei_as01]stp pathcost-standard dot1d-1998

 

Huawei switch:

stp region-configuration

region-name VSNL

revision-level 20

instance 1 vlan 224 1100 to 1299 1500 to 1899

instance 2 vlan 3100 to 3549

instance 3 vlan 246 3000 to 3099

instance 4 vlan 2400 to 2999

instance 5 vlan 3550 to 4000

instance 6 vlan 1300 to 1499 1900 to 2399

instance 7 vlan 400 to 999

instance 8 vlan 2 to 223 225 to 245 248 to 399 1000 to 1099

active region-configuration

#

 

[Huawei_as01-GigabitEthernet0/0/4] stp no-agreement-check

[Huawei_as01-GigabitEthernet0/0/4] stp config-digest-snoop

Suggestions

Cisco usually use a private protocol, you need to configure the appropriate features in order to make the protocol work properly.

END