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Webcast-Catalyst9k
New Member

service policy direction on vlan interface

Hi,

    <SW1>--------(Router)--------<SW2>

I've 4 servers (10.1.1.89, 10.1.1.90, 10.1.1.91, 10.1.1.92) in vlan20 on SW1 and 4 servers in VLAN 21(10.1.1.121, 10.1.1.122, 10.1.1.123, 10.1.1.124) on SW2.

on SW1: I've to limit b/w for traffic going out from those 4 servers to 20M. I don't want limit b/w for others servers in vlan20.

on SW2: I've to limit b/w for traffic going out from those 4 servers to 20M. I don't want limit b/w for others servers in vlan21.

in which direction should I apply service policy on vlan interface(would it be in "in" direction or "out" direction)?

below is the configuration that I built.

SW1:

access-list extended SERVERS permit ip host 10.1.1.89 any

access-list extended SERVERS permit ip host 10.1.1.90 any

access-list extended SERVERS permit ip host 10.1.1.91 any

access-list extended SERVERS permit ip host 10.1.1.92 any

class-map match-all SERVERS-HOST

match access-group SERVERS

policy-map BW-LIMIT

class SERVERS-HOST

  shape average 20000000

class class-default

  fair-que

int vlan20

service-policy in BW-LIMIT

====

SW2:

access-list extended SERVERS permit ip host 10.1.1.121 any

access-list extended SERVERS permit ip host 10.1.1.122 any

access-list extended SERVERS permit ip host 10.1.1.123 any

access-list extended SERVERS permit ip host 10.1.1.124 any

class-map match-all SERVERS-HOST

match access-group SERVERS

policy-map BW-LIMIT

class SERVERS-HOST

  shape average 20000000

class class-default

  fair-que

int vlan21

service-policy in BW-LIMIT

Please advise. Thanks in advance...

3 REPLIES
Hall of Fame Super Gold

service policy direction on vlan interface

Switches are not good for traffic shapping. Do that on router.

New Member

service policy direction on vlan interface

Hi,

these switches are nexus 7K so I'm pretty sure it won't be any issue.

Super Bronze

Re: service policy direction on vlan interface

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Posting

I haven't worked with the Nexus series, but generally you can't shape ingress (although you can police).

Normally in vs. out on an interface, VLAN or otherwise, is similar to ACLs, i.e. in for ingress traffic to that interface and out for egress traffic on the interface.  Since you note the servers are on those VLANs, you could police them as the traffic ingresses the interface they are connected to or police/shape the traffic to the servers as it egresses the interface toward them.  (Normally you want to police or shape ASAP.)  Although since you didn't describe the topology in full, from what you did describe, the traffic might bypass the switch(es) VLAN interface(s) going between VLANs 20 and 21.

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