Egress ACL Rate Limiting
The device supports egress port and ACL
rate limiting. With egress ACL rate limiting, you can control the egress rate limit on a
Layer 2 VLAN, a bridge domain, or an ACL.
Important
The egress ACL rate
limiting feature is not supported on
SLX 9150.
In general, you configure a rate limit profile by creating a QoS policy and associating it with
a QoS class map. Under this rate limit profile, you configure the expected rate. Egress
ACL rate limiting supports the following scheduling and shaping rules:
- Eight priorities for each rate limit profile and strict
priority for traffic in a rate limit profile (VLAN, BD, ACL).
- Traffic with the same priority destined to the same port but belonging to a
different rate limit profile is treated as round robin.
- Traffic with different priorities destined to the same port but belonging to a
different rate limit profile is treated as LOW (0-3) and HIGH (4-7). The device
supports strict priority between HIGH and LOW.
- All priority flows for a rate limit profile are under the same shaper. Each rate
limit profile shaping rate is aggregated for all priorities.
- Flows from all class maps, including normal traffic, are rate limited by the
configured port rate.
Table 1. Supported network topology for
unicast ingress and egress traffic
| Ingress packets |
Egress packets |
| Layer 2 port, VLAN or BD |
Layer 2 port, VLAN or BD |
| VPLS |
Layer 2 port, VLAN or BD |
Note
A VPLS or VxLAN egress topology is not
supported. Multicast traffic is not rate limited by the RL profile but it is rate
limited by the port rate limit.
