Priority Queue in ASA sub interface

[uthayaman]

Hi,

We planned to configure QOS in our ASA. Decided to go for priority queue, but the problem is, asa is cofigured with subinterfaces. If i apply the command priority-queue physica interface name, then this will take care of subinterfaces configured under the physical interface?

Is there any way we can use priority queue for subinterface links.

[varrao]

Hi,

As per your query,QoS is not supported on a subinterface,  only on the main interface itself. If you configure QoS on an interface  itself, all the sub-interfaces are also affected by the QoS. Here is the doc for it:

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a008080dfa7.shtml

Hope this helps

Thanks,

Varun

[Mark Walters]

Hi Guys -

When people choose to configure  subinterfaces on an ASA, as I generally do, they commonly don't  configure the physical interface at all -- no NAMEIF, no IP address,  etc.  In this case you'll need to put a 'NAMEIF' on the physical interface in order to apply the priority queue, which will then be inherited by the  subinterfaces as described above.

Note that the service-policy (that specifies "priority" queueing for some traffic) is still applied to the subinterface.

Example:

interface GigabitEthernet0/0

description [OUTSIDE] MAIN OUTSIDE INTERFACE

speed 1000

duplex full

nameif OUTSIDE_PHYSICAL

security-level 0

no ip address

!

priority-queue OUTSIDE_PHYSICAL

queue-limit 1000

tx-ring-limit 167

!

!

interface GigabitEthernet0/0.99

description OUTSIDE INTERFACE

vlan 99

nameif OUTSIDE

security-level 0

ip address 1.1.1.1 255.255.255.248 standby 1.1.1.2

!

policy-map QOS_OUTSIDE

class IMPORTANT_C

  priority

!

service-policy QOS_OUTSIDE interface OUTSIDE

Cheers!

Mark Walters

CCIE 20571

[dimitar.todorov]

Hi Mark,

Have you ever got your question answered?

Cheers,

Dee