Eth-trunk configuration between S5720 and Cisco 2960 switches

Latest reply: Oct 27, 2018 22:08:22 1300 13 13 2
transparent.gif Issue Description

S5720 (V200R010C00SPC600) connect to Cisco Catalist 2960 by 2 links in eth-trunk. 
Configuration example - KB EKB1000435123 (for Cisco 4506) did not help to solve the issue.

Eth-trunk at Huawei – DOWN, at Cisco – UP.

transparent.gif Alarm Information

Huawei S5720 diagnostic:

5f94909f6f634da288e3d90b0143be26

Cisco Catalist 2960 diagnostic:

81ff3f8b963e4d0aa6092c7e9b945d71

transparent.gif Handling Process

Huawei switch config:

interface Eth-Trunk11
 description Cisco2960-4-2
 port link-type trunk
 port trunk allow-pass vlan 3 8 21 30 to 31
 stp bpdu-filter enable
 stp edged-port disable
 mode lacp

interface GigabitEthernet0/0/14
 undo negotiation auto
 description Cisco2960-4-2_1
 eth-trunk 11

interface GigabitEthernet1/0/14
 undo negotiation auto
 description Cisco2960-4-2_2
 eth-trunk 11

Cisco 2960 switch config:

 interface Port-channel1
 description UpSwitch
 switchport trunk allowed vlan 1,3,8,21
 switchport mode trunk

interface GigabitEthernet1/0/25
 description UpSwitch_1
 switchport trunk allowed vlan 1,3,8,21
 switchport mode trunk
 channel-group 1 mode on
!
interface GigabitEthernet1/0/26
 description UpSwitch_2
 switchport trunk allowed vlan 1,3,8,21
 switchport mode trunk
 channel-group 1 mode on

transparent.gif Root Cause

As LACP is used in EtherChannel, at Cisco side interfaces must be added to EtherChannel in passive mode.

 

transparent.gif Solution

Modify Cisco switch configuration of port-channel group at member-Interface view :
channel-group 1 mode on ------>>> channel-group 1 mode passive

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Created Oct 12, 2018 14:43:07 Helpful(0) Helpful(0)

at first, I want to thank you very much. it is a good example, it shows us how huawei to configure eth-trunk with cisco.
I am very interested for this post, which is very helpful to our daily troubleshooting. I always have similar problems in my daily work, but I do not know how to deal with them. Now I have a clear idea. Thank you very much for your sharing. Hope you can update continue like this This post was last edited by Torrent at 2018-10-22 14:03.
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Created Oct 12, 2018 15:31:45 Helpful(0) Helpful(0)

The attributes on all member interfaces of an Eth-Trunk must be consistent and cannot be changed separately. If the preceding attributes of an Eth-Trunk are changed, the attributes of all the member interfaces are changed accordingly.

It is recommended that you run the shutdown (interface view) command to disable an interface before adding the interface to an Eth-Trunk. After adding interfaces at both ends of a link to an Eth-Trunk, run the undo shutdown (interface view) command to enable the interfaces. Otherwise, traffic interruption or broadcast storms may occur.

It is recommended that you run the shutdown (interface view) command to disable a member interface before running the undo eth-trunk command to remove the member interface from an Eth-Trunk.

The number of member interfaces of the Eth-Trunk on devices at both ends must be the same. The interfaces at both ends must be connected with straight-through cables. This post was last edited by SupperRobin at 2018-10-31 15:05.
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Created Oct 15, 2018 08:56:19 Helpful(0) Helpful(0)

The attributes include:

  • Link type
  • VLAN that the interface belongs to
  • VLAN mapping
  • VLAN stacking
  • QinQ protocol number
  • Interface priority
  • Whether the interface allows BPDUs to pass through
  • MAC address learning
  • Adding the interface to a multicast group statically
  • Discarding broadcast packets
  • Discarding unknown multicast packets
  • Discarding unknown unicast packets
  • Controllable multicast profile bound to the interface
This post was last edited by No.9527 at 2018-10-31 14:53.
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Created Oct 15, 2018 15:31:51 Helpful(0) Helpful(0)

In the case of such a docking cisco device, may I ask if you can share some of these cases, and this problem will often bother me. Especially in the positioning of this problem, thank you This post was last edited by Mark.hu at 2018-10-31 15:05.
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Created Oct 15, 2018 15:32:25 Helpful(0) Helpful(0)

all the CMD is pic, would you please share the word version, i think that maybe more useful This post was last edited by yjhd at 2018-10-31 17:12.
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Created Oct 15, 2018 16:41:55 Helpful(0) Helpful(0)

can you please explain about the difference, thank you

 

channel-group 1 mode on ------>>> channel-group 1 mode passive

This post was last edited by GongXiaochuan at 2018-10-30 12:35.
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Good Good Study Day Day Up
Created Oct 16, 2018 11:57:23 Helpful(0) Helpful(0)

This is exactly what I was looking for. I have been stuck for a long time on this problem. you gave me a very good idea ,I very much appreciate it.

Please keep on post and share more cases for all of us
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Created Oct 19, 2018 11:29:47 Helpful(0) Helpful(0)

The attributes include:

  • Link type
  • VLAN that the interface belongs to
  • VLAN mapping
  • VLAN stacking
  • QinQ protocol number
  • Interface priority
  • Whether the interface allows BPDUs to pass through
  • MAC address learning
  • Adding the interface to a multicast group statically
  • Discarding broadcast packets
  • Discarding unknown multicast packets
  • Discarding unknown unicast packets
  • Controllable multicast profile bound to the interface
This post was last edited by No.9527 at 2018-10-31 14:53.
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Created Oct 19, 2018 17:38:49 Helpful(0) Helpful(0)

I just face similar issue, thanks for sharing, it resolve my issue.Eth-trunk configuration between S5720 and Cisco 2960 switches-2781605-1 I always have similar problems in my daily work, but I do not know how to deal with them. Now I have a clear idea.  This post was last edited by yangyong at 2018-10-30 21:10.
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