01-31-2006 04:21 AM - edited 03-03-2019 01:38 AM
Cat3750G:
interface GigabitEthernet1/0/1
description Link to 3560-1
switchport trunk encapsulation dot1q
switchport mode trunk
load-interval 30
mls qos trust dscp
!
interface GigabitEthernet1/0/3
description Link to SRC
switchport access vlan 15
switchport mode access
load-interval 30
duplex full
speed 100
mls qos trust cos
!
Gi1/0/3 - connected to Voice Gateway Cisco3745
Gi1/0/1 - connected to Catalyst 3560
=========================
When i saw traffic at port Gi1/0/3 using SPAN - i saw packets from Cisco3745 with IP DSCP EF.
But if i saw saw traffic at port Gi1/0/1 using SPAN - i saw packets from Cisco3745 with IP DSCP 0.
From that i made desicion that packet from Cisco3745 input into Cat3750G( port gi1/0/3) with DSCP EF and exit from Cat3750G( port gi1/0/1) with DSCP 0
Is't right behavior?
Solved! Go to Solution.
01-31-2006 04:56 AM
As this link is no trunk, frames that are sent over it carry no 802.1p info. The switch will have to examine dscp and set the cos accordingly.
You have to trust dscp instead of cos on int gi1/0/3.
Regards,
Leo
01-31-2006 04:48 AM
Hi,
What CoS values do the packets coming in to port Gi1/0/3 have ? Since you are trusting CoS, a CoS of 0 will be mapped to DSCP 0 by default...
Hope that helps - pls rate posts that help.
Regards,
Paresh
01-31-2006 05:23 AM
The packets from VoiceGataway where policy on interface looked into gi1/0/3
policy-map Samara
class RTP
priority 2500
set dscp ef
class CCAPP
bandwidth 500
set precedence 3
Strange things that a saw packets on input gi1/0/3 with DSCP EF and same packets on output gi1/0/1 with DSCP 0
01-31-2006 05:34 AM
What class-map are you using to define class RDP?
Just naming the policy-map RDP will not suffice to make it work as intended.
Regards,
Leo
01-31-2006 04:56 AM
As this link is no trunk, frames that are sent over it carry no 802.1p info. The switch will have to examine dscp and set the cos accordingly.
You have to trust dscp instead of cos on int gi1/0/3.
Regards,
Leo
01-31-2006 05:37 AM
Excellent! It's helped!
Best regards!
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