SW huawei(L2) trunking with cisco sw (L3)

Created: Nov 17, 2017 11:30:52Latest reply: Nov 21, 2017 22:29:55 2048 3 0 0
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hi,

the network of our client have a cisco switchs (Sw L3 connecte Sws L2 ) and we had replaced the switchs L2 by Huawei Switchs L2, evrything is good trunking is good, but we find a problem wich is the managment IPs of Huawei switchs are unrecheable from other vlan, and the same IPs management of huawei switchs are recheable from cisco SW FED(L3), we need some help in this situation.

other thing is thas the cisco Switch L3 has a STP per vlan (PVST) and we don't know how we can configure the Huawei switchs L2 by STP like PVST.

best regard.
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PiotrekRGC
Created Nov 21, 2017 15:36:10 Helpful(1) Helpful(1)

Hi,
As to the first problem - just check if you set default route on HUAWEI switches
ip route-static 0.0.0.0 0.0.0.0 <ip_of_mgmt_vlaninterf_on_CISCO_SW_L3>

The second issue...
Enterprise HUAWEI switches support 3 main modes of STP - stp, rstp, mstp (default)
If there is a problem witch compatibility related to other vendor sw, HUAWEI switch resorts to STP mode on the interface connected to the segment leading to the other sw.
PVST is proprietary CISCO protocol as far as I know, so you need to decide wether to change to MSTP mode on CISCO (and configure VLAN mappings, region settings, instances, priorities etc. on both HUAWEI and CISCO so MSTP on both switches groups can colaborate). That's the most preferable way, I think.
Not sure about pure RSTP mode on CISCO... You may try proprietary RPVST on CISCO and RSTP mode on HUAWEI but I haven't tested this mix so far. MSTP is supported by both HUAWEI and CISCO so it seems to be the best solution.
Check priorities on all switches and make sure, that CISCO is the root sw (if your topology sais it shoul be the root - but as it is L3 routing sw it seems it should)
You may also want to set :
stp pathcost-standard legacy
and on interface (trunk) :
stp no-agreement-check
(check documetation for ex. HedEx for "Setting Parameters for Interoperation Between Huawei and Non-Huawei Devices")

The other way is to set an ordinary stp mode on HUAWEI (stp mode stp), but that would be problematic in some topologies (non optimal paths, etc.) and is not recommended unless there is no other way.

Regards, Piotr

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WoodWood
WoodWood Created Nov 20, 2017 01:09:26 Helpful(0) Helpful(0)

waiting for help ,please
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PiotrekRGC
PiotrekRGC Created Nov 21, 2017 15:36:10 Helpful(1) Helpful(1)

Hi,
As to the first problem - just check if you set default route on HUAWEI switches
ip route-static 0.0.0.0 0.0.0.0 <ip_of_mgmt_vlaninterf_on_CISCO_SW_L3>

The second issue...
Enterprise HUAWEI switches support 3 main modes of STP - stp, rstp, mstp (default)
If there is a problem witch compatibility related to other vendor sw, HUAWEI switch resorts to STP mode on the interface connected to the segment leading to the other sw.
PVST is proprietary CISCO protocol as far as I know, so you need to decide wether to change to MSTP mode on CISCO (and configure VLAN mappings, region settings, instances, priorities etc. on both HUAWEI and CISCO so MSTP on both switches groups can colaborate). That's the most preferable way, I think.
Not sure about pure RSTP mode on CISCO... You may try proprietary RPVST on CISCO and RSTP mode on HUAWEI but I haven't tested this mix so far. MSTP is supported by both HUAWEI and CISCO so it seems to be the best solution.
Check priorities on all switches and make sure, that CISCO is the root sw (if your topology sais it shoul be the root - but as it is L3 routing sw it seems it should)
You may also want to set :
stp pathcost-standard legacy
and on interface (trunk) :
stp no-agreement-check
(check documetation for ex. HedEx for "Setting Parameters for Interoperation Between Huawei and Non-Huawei Devices")

The other way is to set an ordinary stp mode on HUAWEI (stp mode stp), but that would be problematic in some topologies (non optimal paths, etc.) and is not recommended unless there is no other way.

Regards, Piotr

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Kevin_Bates
Kevin_Bates Created Nov 21, 2017 22:29:55 Helpful(2) Helpful(2)

If it helps we had a similar issue, that we could not reach the Huawei from the Cisco switches on the management vlan 4 in our case), we have to pass the vlan 4 traffic to the Huawei as native from the Cisco.


interface TenGigabitEthernet1/0/1
description Link To Huawei
switchport trunk native vlan 4
switchport trunk allowed vlan 1-500
switchport mode trunk
end

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