Policer Bandwidth and Burst-Size Limits

 

Table 1 lists each of the Junos OS policer types supported. For each policer type, the table summarizes the bandwidth limits and burst-size limits used to rate-limit traffic.

Table 1: Policer Bandwidth Limits and Burst-Size Limits

Policer Type

Bandwidth Limits

Burst-Size Limits

Single-Rate Two-Color Policer

Defines a single rate limit: a bandwidth limit and an allowed burst size for conforming traffic.

For a single-rate two-color policer only, you can specify the bandwidth limit as a percentage value from 1 through 100 instead of as an absolute number of bits per second. The effective bandwidth limit is calculated as a percentage of either the physical interface media rate or the logical interface configured shaping rate.

bandwidth-limit bps;

M  and T Series routers:

8000..100000000000

MX Series routers:

8000..18446744073709551615

burst-size-limit bytes;

M, MX, and T Series routers:

1500..10000000000

bandwidth-percent

1..100 percent

Single-Rate Three-Color Policer

Defines a single rate limit: a bandwidth limit and an allowed burst size for conforming traffic.

Also defines a second, larger burst size. This second burst size is used to differentiate between two categories of nonconforming traffic (yellow or red).

committed-information-rate bps;

M and T Series routers:

1500..100000000000

MX Series routers:

8000..18446744073709551615

committed-burst-size bytes;

M, MX, and T Series routers:

1500..100000000000

excess-burst-size bytes;

M, MX, and T Series routers:

1500..100000000000

Two-Rate Three-Color Policer

Defines a committed rate limit: a bandwidth limit and an allowed burst size for conforming traffic.

Also defines a peak rate limit: a second, larger burst size and a second, higher bandwidth limit. These additional rate-limit components are used to differentiate between two categories of nonconforming traffic (yellow or red).

committed-information-rate bps;

M and T Series routers:

1500..100000000000

MX Series routers:

8000..18446744073709551615

committed-burst-size bytes;

M, MX, and T Series routers:

1500..100000000000

peak-information-rate bps;

M and T Series routers:

1500..100000000000

MX Series routers:

8000..18446744073709551615

peak-burst-size bytes;

M, MX, and T Series routers:

1500..100000000000

Hierarchical Policer

Defines two policers, each with a bandwidth limit and an allowed burst size for conforming traffic. Different policing actions are applied based on whether the packets are classified for expedited forwarding (EF) or for a lower priority.

Rate-limits ingress Layer 2 traffic at a SONET physical or logical interface hosted on supported routing platforms only.

bandwidth-limit bps;

M40e, M120, and M320 (with FFPC and SFPC) edge routers and T320, T640, and T1600 core routers with Enhanced Intelligent Queuing (IQE) PICs:

32000..50000000000

MX Series routers:

8000..18446744073709551615

burst-size-limit bytes;

M40e, M120, and M320 (with FFPC and SFPC) edge routers and T320, T640, and T1600 core routers with Enhanced Intelligent Queuing (IQE) PICs:

1500..2147450880