Given a 4500 in an environment that isn't going to use Scavenger/CS1 and best practice which states:
DSCP-TxQueue Mapping Table (dscp = d1d2)
d1 : d2 0 1 2 3 4 5 6 7 8 9
-------------------------------------
0 : 02 01 01 01 01 01 01 01 01 01
1 : 01 01 01 01 01 01 04 02 04 02
2 : 04 02 04 02 04 04 04 02 02 02
3 : 02 02 04 03 04 03 04 03 04 03
4 : 03 03 03 03 03 03 03 03 04 04
5 : 04 04 04 04 04 04 04 04 04 04
6 : 04 04 04 04
Does anyone know a good reason for 0/Default existing in Q2 instead of Q1?
I can't seem to demonstrate a reason with the testing I'm doing. Granted, I'm going to put it in Q2 just in case they decide to use scavenger later on down the road, but I am curious if there's a real reason why other than Cisco says so.
As far as I can tell Q1 vs. Q2 is just another bit bucket with another bandwidth allocation, there's no documented different priority for the two within the switch itself except the output of this command:
Switch#show platform mapping tx-queue
Tx-Queue
CLI Hardware
1 3
2 2
3 0
4 1
But it's an undocumented command.
So what's the difference between the two?
--
-Mark Turpin