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frames are forwarded on egress queue 0 without changing the incoming dot1p value. The example
shows how dynamic CoS remaps (or does not remap) the dot1p priority in 802.1X-authenticated traffic
and how the frames are forwarded:
Incoming Frame
Tagged dot1p
--------------
0
1
2
3
4
5
6
7
•
The priority of untagged packets is assigned according to the remapped value of priority 0 traffic in the
RADIUS-based table. For example, in the following remapping table, untagged packets are tagged with
priority 2:
Dell#show dot1x cos-mapping interface TenGigabitethernet 2/3
802.1Xp CoS remap table on Te 2/3:
-----------------------------
Dot1p Remapped Dot1p
0
2
1
6
2
5
3
4
4
3
5
2
6
1
7
0
•
After being re-tagged by dynamic CoS for 802.1X, packets are forwarded in the switch according to their
new CoS priority.
•
When a supplicant logs off from an 802.1X authentication session, the dynamic CoS table is deleted or
reset. When an 802.1x session is re-authenticated, the previously assigned CoS table is retained through
the re-authentication process. If the re-authentication fails, the CoS table is deleted. If the re-
authentication is successful and the authentication server does not include a CoS table in the AUTH-
ACCEPT packet, the previously assigned CoS table MUST be deleted. If the re-authentication is
successful and the server sends a CoS table, the old CoS table is overwritten with the new one.
•
If multi-supplicant authentication mode is enabled on a port, you can configure a CoS mapping table for
specified MAC addresses in the RADIUS server. Dell Networking OS then maintains a per-MAC CoS table
for each port, and marks the priority of all traffic originating from a configured MAC address with the
corresponding table value.
•
To display the CoS priority-mapping table provided by the RADIUS server and applied to authenticated
supplicants on an 802.1X-enabled port, enter the show dot1x cos-mapping interface command.
RADIUS-based
Outgoing Frame Egress Queue
CoS Remap Table
Tagged dot1p
---------------
-------------- ------------
7
0
5
1
4
4
6
6
3
4
1
5
2
2
4
4
0
0
2
3
0
0
0
2
802.1X
126
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Troubleshooting
