4000 Router Series ACL and QoS Configuration Guide

[RouterA-acl-basic-2001] rule permit source 1.1.1.1 0

[RouterA-acl-basic-2001] quit

[RouterA] acl number 2002

[RouterA-acl-basic-2002] rule permit source 1.1.1.2 0

[RouterA-acl-basic-2002] quit

# Configure CAR policies for different flows received on Ethernet 1/1.

[RouterA] interface ethernet 1/1

[RouterA-Ethernet1/1] qos car inbound acl 2001 cir 54 cbs 4000 ebs 0 green pass red

remark-prec-pass 0

[RouterA-Ethernet1/1] qos car inbound acl 2002 cir 8 cbs 1875 ebs 0 green pass red

discard

[RouterA-Ethernet1/1] quit

2. Configure Router B:

# Configure a CAR policy on Ethernet 1/1 to limit the incoming traffic rate to 500 kbps and drop

the excess packets.

<RouterB> system-view

[RouterB] interface ethernet 1/1

[RouterB-Ethernet1/1] qos car inbound any cir 500 cbs 32000 ebs 0 green pass red discard

[RouterB-Ethernet1/1] quit

# Configure a CAR policy on Ethernet 1/2 to limit the sending rate to 1 Mbps and drop the excess

packets.

[RouterB] interface ethernet 1/2

[RouterB-Ethernet1/2] qos car outbound any cir 1000 cbs 65000 ebs 0 green pass red

discard

IP rate limit configuration example

Network requirements

As shown in Figure 12, configure a CAR-list-based CAR policy on Ethernet 1/2 to limit the rate of

incoming packets from each IP address in the range of 2.1.1.1 to 2.1.1.100 to 5 kbps and to allow all IP

addresses in the range to share the remaining bandwidth.

Figure 12 Network diagram