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why the l2protocol statis...

why the l2protocol statistics is not showing the lacp input/output packet

Latest reply: Dec 29, 2018 15:42:38 296 4 7 0
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[Problem Description]

why the l2protocol statistics is not showing the lacp input/output packet

[Problem Analysis]

The l2protocol-tunnel group-mac command enables the switch to replace the multicast destination MAC address of Layer 2 protocol packets with a specified multicast MAC address.

The undo l2protocol-tunnel command disables the group MAC function for Layer 2 protocol transparent transmission. After you run this command, the switch deletes a configured multicast destination MAC address of Layer 2 protocol packets except STP packets that uses the default multicast destination address or restores the default multicast destination MAC address of STP packets.

<http://support.huawei.com/hedex/pages/EDOC1000042064DED0417A/09/EDOC1000042064DED0417A/09/resources/dc/l2protocol-tunnel_group-mac.html?ft=99&id=l2protocol-tunnel_group-mac&keyword=l2protocol&keyword=tunnel&keyword=stp&text=%2525253Cb%2525253El2protocol%2525253C%2525252Fb%2525253E-%2525253Cb%2525253Etunnel%2525253C%2525252Fb%2525253E%25252Bgroup-mac&docid=EDOC1000042064>

 

So we need to add the [S5720-47]l2protocol-tunnel lacp group-mac （default-group-mac）the mac you also can use actual Cisco lacp-MAC

Command.

[Root Cause] 

Because the layer 2 passthrough of lacp is not turned on by default; stp is turned on by default; so you need to manually configure lacp's group-mac.

 

[Solution Description]

 [S5720-47]l2protocol-tunnel lacp group-mac （default-group-mac）the mac you also can use actual Cisco lacp-MAC

Command.

  • x
  • convention：

Helpful (7) Favorite(0) Share
yjhd Created Dec 26, 2018 17:00:23 Helpful(0) Helpful(0)

The l2protocol-tunnel group-mac command enables the switch to replace the multicast destination MAC address of Layer 2 protocol packets with a specified multicast MAC address.
  • x
  • convention：
GongXiaochuan Created Dec 28, 2018 10:57:18 Helpful(0) Helpful(0)

link aggregation applies to various methods of combining (aggregating) multiple network connections in parallel in order to increase throughput beyond what a single connection could sustain, and to provide redundancy in case one of the links should fail
  • x
  • convention：
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Finn92 Created Dec 29, 2018 10:41:30 Helpful(0) Helpful(0)

Layer 2 protocols running between user networks, such as MSTP, LACP, and HGMP, must traverse a backbone network to perform Layer 2 protocol calculation.

Generally, the destination MAC addresses in Layer 2 protocol packets of the same Layer 2 protocol are the same. For example, the MSTP PDUs are BPDUs with the destination MAC address 0180-C200-0000. Therefore, when a Layer 2 protocol packet reaches an edge device on a backbone network, the edge device cannot identify whether the Layer 2 protocol packet comes from a user network or the backbone network and sends the Layer 2 protocol packet to the CPU to calculate a spanning tree. As a result, the user network devices calculate a spanning tree with backbone network edge devices but not with user network devices.

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  • convention：
SupperRobin Created Dec 29, 2018 15:42:38 Helpful(0) Helpful(0)

Multiple tenants in data centers need to be isolated, but switches cannot implement refined isolation. Therefore, MUX VLAN applies only to office networks of small enterprises, but does not to multi-tenant scenarios in large data centers.
  • x
  • convention：
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