No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.

Knowledge Base

raging QoS to Limit the Rate of a LAN to Access the Public Network

Publication Date:  2014-09-11  |   Views:  879  |   Downloads:  0  |   Author:  xwx00004807  |   Document ID:  EKB1000003552


Issue Description

The rate of LAN to access the public network is limited to 1 Mbit/s, whereas the internal access rate of the LAN is not limited. The access rate of LAN is not limited. The partner applies QoS to E0/0/2. However, the solution failed the customer’s requirements. The access rate is unstable, and the internal access rate is low.

Alarm Information


Handling Process

1.      Modify the ACL as follows.
acl number 3201
rule 5 permit ip source
acl number 3300
rule 5 permit ip destination
2.      Modify the QoS policy as follows.
traffic classifier limit_source_1 operator and
if-match acl 3201
traffic classifier limit_destination_1 operator and
if-match acl 3300
traffic behavior limit_source_1
car cir 1024000 cbs 1024000 ebs 0 green pass red discard
traffic behavior limit_destination_1
car cir 1024000 cbs 1024000 ebs 0 green pass red discard
qos policy limit_source_1
classifier limit_source_1 behavior limit_source_1
qos policy limit_destination_1
classifier limit_destination_1 behavior limit_destination_1
3.      Apply the QoS policy to the egress interface E0/0/3 of the public network.
interface Ethernet0/0/4
ip address              #This is a virtual IP address.#
qos apply policy limit_source_1 outbound
qos apply policy limit_destination_1 inbound

Root Cause

1.        The ACL is incorrect.
2.        The rate is incorrect.
3.    The QoS policy is applied to an incorrect port


Configure the ACL correctly and apply the QoS policy to a proper interface.