Hi guys,
Does anyone know the size of hw queue on ethernet interfaces and how you can change it?
I have a 2811 router and I am trying to find out what is the size of its fastethernet hardware queue. I issued the command "sh controllers fastEthernet 0/0" and part of the response is :
Tx Rings
--------
Tx Ring 0 Tx Ring 1
- size = 256 - size = 0
- head = 125 - head = 0
- tail = 125 - tail = 0
- usedtxds = 0 - usedtxds = 0
- framecnt = 0 - framecnt = 0
- shadow = 0x46EF4D80 - shadow = 0x00000000
- ring = 0x0F1B63E0 - ring = 0x00000000
- ring_malloc = 0x3F1B63E0 - ring_malloc = 0x00000000
Tx Ring 2 Tx Ring 3
- size = 0 - size = 0
- head = 0 - head = 0
- tail = 0 - tail = 0
- usedtxds = 0 - usedtxds = 0
- framecnt = 0 - framecnt = 0
- shadow = 0x00000000 - shadow = 0x00000000
- ring = 0x00000000 - ring = 0x00000000
- ring_malloc = 0x00000000 - ring_malloc = 0x00000000
Tx Ring 4 Tx Ring 5
- size = 0 - size = 0
- head = 0 - head = 0
- tail = 0 - tail = 0
- usedtxds = 0 - usedtxds = 0
- framecnt = 0 - framecnt = 0
- shadow = 0x00000000 - shadow = 0x00000000
- ring = 0x00000000 - ring = 0x00000000
- ring_malloc = 0x00000000 - ring_malloc = 0x00000000
Tx Ring 6 Tx Ring 7
- size = 0 - size = 0
- head = 0 - head = 0
- tail = 0 - tail = 0
- usedtxds = 0 - usedtxds = 0
- framecnt = 0 - framecnt = 0
- shadow = 0x00000000 - shadow = 0x00000000
- ring = 0x00000000 - ring = 0x00000000
- ring_malloc = 0x00000000 - ring_malloc = 0x00000000
As I can see fom this command the size of the hardware queue should be 256 packets (Am I right? Is this the right command to see?).
I have changed the queuing method on this fastethernet interface form the default, fifo, to wfq and also llq. When I reissued the command "sh controllers fastEthernet 0/0" nothing changed in the output. I tried also changing the depth of the hw queue manually by typing "tx-queue-limit 20" and still nothing changed.
This is my conf on this interface:
interface FastEthernet0/0
bandwidth 512
ip address 10.1.120.110 255.255.255.0
tx-ring-limit 20
tx-queue-limit 20
duplex auto
speed auto
service-policy output Voce
end
Thanks for the help.
