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Knowledge Base

FAQ How to transparent Cisco private protocol packets at S9300

Publication Date:  2012-07-27  |   Views:  198  |   Downloads:  0  |   Author:  Jiang Hongjun  |   Document ID:  EKB0000562389

Contents

Issue Description

Question:
1. Topology:
---------------G3/0/23 G3/0/21 G3/0/21 ---G3/0/23
Cisco-A------------S9303-1--------------S9303-2------------Cisco-B
2. A lot of private protocols are running between Cisco-A and Cisco-B, such as cdp,vtp,dtp, stp,lacp,pagp and udld.
How can S9303 transparent those protocol packets by adding related configurations?

Alarm Information

No

Handling Process

For those ports connecting to Cisco-A and Cisco-B, implement bellow configures:
interface GigabitEthernet3/0/23
port link-type trunk
port trunk allow-pass vlan 231
bpdu-tunnel enable
bpdu enable
undo negotiation auto
For those ports connecting between S9303-1 and S9303-2, implement bellow configures:
interface GigabitEthernet3/0/21
port link-type trunk
port trunk allow-pass vlan 231
bpdu enable
undo negotiation auto
Implement bellow configures at global configuration view of S9303-1 and S9303-2:
bpdu-tunnel cdp group-mac 0100-0ccd-cdd0
bpdu-tunnel vtp group-mac 0100-0ccd-cdd0
bpdu-tunnel dtp group-mac 0100-0ccd-cdd0
bpdu-tunnel lacp group-mac 0100-0ccd-cdd0
bpdu-tunnel pagp group-mac 0100-0ccd-cdd0
bpdu-tunnel udld group-mac 0100-0ccd-cdd0


Root Cause

No

Suggestions

Enable bpdu-tunnel feature at S9300 and modify mac address of those protocol packets so that S9300 can transparent the packets. Otherwise, those protocols packets would be forwarded to CPU for handling.