Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

cisco alcatel

Whwn trunking between a 7600 and an alcatel router, my management vlan is not functioning properly? Could it be due to the mtu of tagged packets?

Thanks in advance.


Re: cisco alcatel

I think you have to use the trunk protocol ISL and also you have to disabled the trunk and tried to set up an ethernet connection . Use the another available port and cross the fx links and connect it to another switch this way the link should come up.

The following URL will help you:


Re: cisco alcatel

Hi Onur,

I have 7800 Alcatels. When you say not functioning properly, do you have no connectivity? What tagging are you using?

My Alcatel,

wdh-mdf1-swi-f> show vlan 1063

Name : SFarm,

Administrative State: enabled,

Operational State : enabled,

1x1 Spanning Tree State : enabled,

Flat Spanning Tree State : enabled,

Authentication : disabled,

IP Router Port : on,

IPX Router Port : none,

wdh-mdf1-swi-f> show 802.1q 9/11

Acceptable Frame Type : Any Frame Type

Force Tag Internal : on

Tagged VLANS Internal Description


9 TAG PORT 9/11 VLAN 9

1063 TAG PORT 9/11 VLAN 1063

1069 TAG PORT 9/11 VLAN 1069

1070 TAG PORT 9/11 VLAN 1070

1071 TAG PORT 9/11 VLAN 1071

Cisco side.


Spanning tree enabled protocol rstp

Root ID Priority 33831

Address 001b.0d5c.3a80

This bridge is the root

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 33831 (priority 32768 sys-id-ext 1063)

Address 001b.0d5c.3a80

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Aging Time 300

Nothing special in the config.