Hi everyone,
The white paper about sup2t System Architecture
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/white_paper_c11-652042.html#wp9000594
says:
By default, packets are passed through without a change in DSCP, EXP, or CoS for L2 packets or L2-classified L3 packets
However, when I see the output of the command "show platform qos" there are " CoS Changes"
----- Switch [1], Module [1] -----
Counter IFE Pkts IFE Bytes OFE Pkts OFE Bytes
---------------------------------------------------------------------------
Policing Drops 0 0 0 0
Policing Forwards 1136306595 26171591950357 1150627829 26173991946454
Police-hi Actions (Lvl3) 0 0 0 0
Police-lo Actions (Lvl2) 0 0 0 0
Aggregate Drops 0 0 0 0
Aggregate Forwards 1136306593 26171591950221 1150627827 26173991946318
Aggregate Exceeds-Hi 0 0 0 0
Aggregate Exceeds-Lo 0 0 0 0
NF Drops 0 0 0 0
NF Forwards 2 136 2 136
NF Exceeds 0 0 0 0
TOS Changes 1
TC Changes 0
EXP Changes 0
COS Changes 949932
Tunnel Decaps 1
Tunnel Encaps 1
1. ¿Why there are cos changes?
2. ¿What are Policing Forwards and Aggregate Forwards?
I have two C6500E (Sup2T Supervisor) in VSS mode and my config is quite similar to defaults.
auto qos default
table-map cos-discard-class-map
map from 5 to 46
interface Port-channel10
switchport
platform qos trust cos
interface GigabitEthernet1/1/6
switchport
platform qos trust cos
channel-group 10 mode active
3. ¿Could it be related to CoPP?
Thank you in advance.
