Riverstone Networks WICT1-12 - Manual (Page 578)

26-16 Riverstone Networks RS Switch Router User Guide Release 8.0
Limiting Traffic Rate QoS Configuration
To define a port rate limit policy, use the following commands in the Configure mode:
Note that for output port policies, the only action that you can specify if traffic exceeds the specified rate is to drop
packets.
If you configure output port policies, all types of outgoing IP traffic will be rate limited, including control traffic. If
you do not want control traffic to be subject to rate limiting, enter the following command in the Configure mode:
Because you specify a slot number in the above command, output port rate limiting policies on any port on the
specified slot will not be applied to control traffic.
26.10.5 Aggregate Rate Limiting
Use an aggregate rate limiting policy if an aggregation of flows needs to be limited to a particular rate. For example,
you can use aggregate rate limiting to rate limit traffic to or from a particular subnet.
Note You cannot apply an aggregate rate limiting policy to an interface that spans ports
on more than one line card. For example, you cannot apply an aggregate rate
limiting policy to the interface ip2, if it interfaces to a VLAN that consists of ports
et.1.(1-4) and et.2.(1-4).
To configure aggregate rate limiting policies, you must first enable aggregate rate limiting mode on the line card (see
Section 26.10.1, "Rate Limiting Modes" ).
Note You cannot use non-IP ACLs for aggregate rate limit policies.
Define a port rate limit policy to
limit incoming traffic on a port.
rate-limit
<name>
port-level input rate
<rate-limit>
port
<port list> {
drop-packets | no-action | lower-priority |
lower-priority-except-control | tos-precedence-rewrite
<val1>
| tos-precedence-rewrite-lower-priority
<val2>}
Define a port rate limit policy to
limit outgoing traffic on a port.
rate-limit
<name>
port-level output port
<port list>
rate
<rate-limit>
drop-packets
Specify that control traffic is not
subject to output port rate limiting.
rate-limit
<name>
port-level slot
<slot-number>
ignore-control-priority