08-26-2008 10:06 PM - edited 03-06-2019 01:00 AM
Hello,
i have QinQ tunnel, is it possible to set user priority (CoS) in inner vlan?
09-01-2008 06:04 AM
VLAN Priority (CoS) Statistics-Enables the monitoring of traffic distribution using different values of the 802.1p priority field
The following URL may help you:
09-01-2008 09:21 AM
Hello Elena,
the answer is yes on C6500 with 12.2SX
see
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_s1.html#wp1012910
set cos-inner cos
To copy the outer COS to the inner COS for double-tagged packets, use the set cos-inner cos command in policy-map class configuration mode. To remove the outer COS copied to the inner COS for double-tagged packets, use the no form of this command.
set cos-inner cos cos-value
no set cos-inner cos cos-value
inside a policy-map
Hope to help
Giuseppe
09-02-2008 02:59 PM
Thanks for your help, but we have't C6500, just only C3550
May be exist another solution.
Cisco2851--------switches-------C3550
Cisco2851:
interface GigabitEthernet0/0.10
encapsulation dot1Q 10 second-dot1q 2-50
pppoe enable group global
C3550:
interface FastEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10
switchport mode trunk
interface FastEthernet0/3
switchport access vlan 10
switchport mode dot1q-tunnel
We want to set CoS in inner (user) vlan tag, 2-20 must have one CoS and 21-50 - another, because the next device after C3550 don't understand vlan, but can
classify traffic by user priority (cos).
Now We are using dot1q-tunnel to hide inner (users) vlans. Is it possible to use something insted of dot1q-tunnel for set CoS on users vlans?
09-03-2008 01:37 PM
Hello Elena,
>>Now We are using dot1q-tunnel to hide inner (users) vlans. Is it possible to use something insted of dot1q-tunnel for set CoS on users vlans?
the Catalyst 3550 should be able to do that: setting CoS 802.1p field on an outgoing trunk port should be possible.
If you want to mark based on Vlan-id you can do it by using an IP ACL: Vlan X means source ip address that of subnet A associated to vlan X.
You can classify IP traffic by using IP standard or IP extended ACLs; you can classify non-IP traffic by using Layer 2 MAC ACLs.
see
You should be able to use the modular QoS with class-map for marking on the ingress interface.
Hope to help
Giuseppe
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