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cisco 3560 switch| mls qos trust dscp question

Hi everybody

Hi everybody .

Please consider the following example:

 

3560 sw f1/1--------trunk---SW2

3560 sw

f1/1

mls qos trust dscp

3560 is using default cos-dscp map, assume a 3560 receives a frame carrying IP packet on f1/1 with COS 4, what will 3560 switch do?

 

1) will it use its default cos --dscp map  ( cos 4--.dscp 32) and rewrite 32 in dscp field  of the packet in the frame and provide PHB for dscp 32 ?

 

Much appreciated!!

 

Have  a great weekend.

 

 

 

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

HiNo it will not trust the

Hi

No it will not trust the cos value, because You have configured to trust dcsp. So, the switch will trust the dcsp value in the incoming frame.

/Mikael

2 REPLIES
Silver

HiNo it will not trust the

Hi

No it will not trust the cos value, because You have configured to trust dcsp. So, the switch will trust the dcsp value in the incoming frame.

/Mikael

Bronze

thanks Mikael

thanks Mikael

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