Meters are used to define ingress rate-limiting and rate-shaping on BlackDiamond X8 and 8800 series, SummitStack, and Summit family switches. Some platforms also support meters for egress traffic. The following sections provide information on meters for specific platforms.

Meters on BlackDiamond X8 and 8800 Series Switches, SummitStack, and Summit Family Switches

The BlackDiamond X8 and 8800 series switches, SummitStack, and Summit family switches use a single-rate meter to determine if ingress traffic is in-profile or out-of-profile.

On BlackDiamond X8, c-, xl-, and xm-series modules and Summit X450-G2, X460-G2, X480, X670, X670-G2, and X770 switches, you can also use single-rate meters to determine if egress traffic is in-profile or out-of-profile.

When ACL meters are applied to a VLAN or to any, the rate limit is applied to each port group. To determine which ports are contained within a port group, use any of the following commands:

show access-list usage acl-range port port

show access-list usage acl-rule port port

show access-list usage acl-slice port port

The out-of-profile actions are drop, set the drop precedence, or mark the DSCP with a configured value. Additionally, each meter has an associated out-of-profile counter that counts the number of packets that were above the committed-rate (and subject to the out-of-profile-action).

On BlackDiamond X8 and 8000 series modules and Summit family switches, the meters are a per-chip, per-slice resource (see ACLs for complete information.)