I am looking at a 7609-S with a RSP720-3CXL running 12.2(33)SRE3.
I have been asked to help with rate limiting some servers attached to a couple of ports running as L2 ports (
switchport mode access), so this requires me to apply a policy-map to the L3 SVI that is the default gateway in this VLAN. When enabling the service policy under the SVI interface configuration I received the following error;
router(config-if)#service-policy input PM-LIMIT-100M Warning (QoS): MLS QoS is disabled, marking/policing will be done after enabling MLS QoS globally
I have a looked through the config and sure enough, there is no "mls qos" in the global configuration. What potential issues can happen from enabling this global config command on this production device? I can obviously perform this during scheduled maintenance period for safety, but should it even be attempted at all?
If it makes any difference, there were no class maps or policy maps defined on this router until I logged in, to make one to rate limit the previously mentioned server ports (all ports are Gig, I have been tasked with limiting this SVI to 100Mps for a short period). I trying to use the following configuration;
class-map match-any CM-LIMIT-100M match access-group name ACL-SERVERS ! policy-map PM-LIMIT-100M class CM-LIMIT-100M police 100000000 18750000 31250000 conform-action transmit exceed-action drop violate-action drop ! int vlan 123 service-policy input PM-LIMIT-100M service-policy output PM-LIMIT-100M
I would like to think there is no potential issues that will occur if I enable this, but you never know so I'm all ears!