Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

DSCP marking for servers

Hello,

I'm wondering what the correct process would be to mark traffic for say an snmp monitoring server.  I have some links that get over utilized regularly and my snmp traffic cannot make it through and gives me false positives.  I have set the snmp-server ip dscp xx on the switches and I can see that the markings are happening and going out of the switch.

!

snmp-server ip dscp 30

!

  dscp: outgoing

-------------------------------

  0 -  4 :   172300578            0            0            0           74

  5 -  9 :           0            0            0            0            0

10 - 14 :           0            0            0            0            0

15 - 19 :           0            0            0            0            0

20 - 24 :           0            0            0            0            0

25 - 29 :           0            0            0            0            0

30 - 34 :       16853            0            0            0            0

35 - 39 :           0            0            0            0            0

40 - 44 :           0            0            0            0            0

45 - 49 :           0            0            0         3516            0

50 - 54 :           0            0            0            0            0

55 - 59 :           0            0            0            0            0

60 - 64 :           0            0            0            0

So the marking is happening and the traffic is prioritized.  Now, what I think is happening is that the snmp server is not getting its requests to the switch because the link is over utilized.  So I need to mark the traffic on the server end?  This server is on a VMWare host, and I am wondering what the best process is to mark traffic from a guest vm server connected to a 3560?

Set the dscp marking on the server itself and then just trust dscp on the trunk port to the vmware host?  Or mark the traffic on the switch using a policy map?

Thanks,

Dan.

2 REPLIES
VIP Super Bronze

DSCP marking for servers

Hi,

Maybe you can try something like this:

The default COS coming from the guest vm server is 0 (default).  Now, on the uplink port on your 3560, you can try rewriting the COS using:

switchport priority extend cos 5

and see if this helps.

HTH

New Member

DSCP marking for servers

Hmmm, don't think I want to do that because there are many more guests on that host and that would mean that all of the guests traffic is marked with cos 5.

220
Views
0
Helpful
2
Replies