Access-Trunk link issue

Unanswered Question
Mar 11th, 2012

Dear All,

what happen if two switches connected using utp cable one end configured static access and the other end configured statis trunk ?

and if it will not work why ?

Thanks

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Average Rating: 0 (0 ratings)
jan.hrnko Sun, 03/11/2012 - 05:32

Hi,

I think that it will work but:

The side that has static access configured will accept only non-tagged frames, because it does not anticipate tagged ones (host side(port) is not even suposed to know in which vlan is he assigned to and host side is not allowed to generate tagged frames). The side that has trunk configured will generate both tagged and untagged frames. As you may know - untagged frames are from hosts that are in the native vlan. So the conclusion is that in such a scenario only hosts in the native vlan would be able to communicate through this link (trunk-access).

Best regards,

Jan

jimmysands73_2 Sun, 03/11/2012 - 08:18

Just a refresher....

DTP Combinations

Figure 1 Administrative Mode Combinations and their Operational Modes Administrative Mode

Auto

Desirable

Trunk (on)

Access (off)

Non-Negotiate (access)

Non-Negotiate (trunk)

Auto

Static access (NT)

Trunk

Trunk

Static access

Static access

Unexpected Results

Desirable

Trunk

Trunk

Trunk

Static access

Static access

Unexpected Results

Trunk (on)

Trunk

Trunk

Trunk

Unexpected Results

Unexpected Results

Trunk

Access (off)

Static access

Static access

Unexpected Results

Static access

Static access

Unexpected Results

Non-Negotiate (access)

Static access

Static access

Unexpected Results

Static access

Static access

Unexpected Results

Non-Negotiate (trunk)

Unexpected Results

Unexpected Results

Trunk

Unexpected Results

Unexpected Results

Trunk

Actions

Login or Register to take actions

This Discussion

Posted March 11, 2012 at 4:44 AM
Stats:
Replies:2 Avg. Rating:
Views:244 Votes:0
Shares:0
Tags: No tags.

Discussions Leaderboard

Rank Username Points
1 14,997
2 8,150
3 7,720
4 7,083
5 6,723
Rank Username Points
175
80
59
55
55