11-25-2011 07:52 AM - edited 03-04-2019 02:24 PM
has anyone seen a good Document on LAYER 3 QoS on a Nexus 7000? especially for LLQ
11-26-2011 11:55 AM
Hi
As I understand, You Need to implement a custom queuing policies based ACLs to provide LLQ/CWFQ functionality on a N7k.
Bandwidth and priority commands can only be implementing in queueing policies and queueing policies are restricted to system queueing class-maps which match only on CoS values.
To implement what you are trying to perform, you can use a QoS policy to mark the DSCP/CoS value. The system queuing class-maps will dictate the queue the packet is sent to in outgoing interface. For example:
ip access-list test_ip_af2
10 permit ip any 172.17.1.10/32
ip access-list test_ip_af4
10 permit ip any 172.17.1.20/32
ip access-list test_ip_ef
10 permit ip any 172.17.1.1/32
class-map type qos match-any test_input_ef
match access-group name test_ip_ef
class-map type qos match-any test_input_af2
match access-group name test_ip_af2
class-map type qos match-any test_input_af4
match access-group name test_ip_af4
NOTE: Following system class-maps configuration can be done ony in default VDC and applies to all existong VDC:
class-map type queuing match-any 1p3q4t-out-pq1
match cos 7
class-map type queuing match-any 1p3q4t-out-q2
match cos 4
class-map type queuing match-any 1p3q4t-out-q-default
match cos 1
policy-map type qos test_in
class test_input_ef
set cos 7
class test_input_af4
set cos 4
class test_input_af2
set cos 1
interface Ethernet X/Y
description -=incomming interface=-
service-policy type qos input test_in
interface Ethernet A/B
description -=outgoing interface=-
service-policy type queuing output test_shaping_out
06-06-2018 12:01 PM
Hi, I have a similar problem but when I try to attach a policiing to the interface VLAN is not posible:
interface VLAN
description -=incomming interface=-
service-policy type qos input test_in <= That is no posible.
06-06-2018 12:40 PM
Hello,
I think applying a policy map to a VLAN interface using a service-policy command under the interface configuration mode for the SVI is not supported. You have to use the syntax below (in this example Vlan 10 is used, change that accordingly):
N7K#conf t
N7K(config)#int vlan 10
N7K(config-if)#vlan configuration 10
N7K(config-vlan-config)#service-policy input test_in
06-06-2018 12:59 PM
Yes I'm using this but how we have a lot of VLANs and policing this is causing a problem on the TCAMs memorys on each module.
I found this https://lists.gt.net/cisco/nsp/136698%C3%A7
06-06-2018 01:11 PM
Hello,
which NX-OS version are you running ?
06-06-2018 01:16 PM
06-06-2018 01:27 PM
Hello,
I don't know of any other way to implement this. Since you are apparently having problems with TCAM, have you tried to pool resources using the bank chaining feature ?
11-26-2011 12:00 PM
Also please consider that each line-card type has it's own system class maps:
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