User's Manual

19-14
Chapter 19 Flow-based Redirection
19.1 Introduction to Flow-based Redirection
Flow-based redirection function enables the switch to transmit the data frames meeting some special
condition (specified by ACL) to another specified port. The fames meeting a same special condition are called
a class of flow, the ingress port of the data frame is called the source port of redirection, and the specified
egress port is called the destination port of redirection. Usually there are two kinds of application of
flow-based redirection: 1. connecting a protocol analyzer (for example, Sniffer) or a RMON monitor to the
destination port of redirection, to monitor and manage the network, and diagnose the problems in the network;
2. Special transmission policy for a special type of data frames.
The switch can only designate a single destination port of redirection for a same class of flow within a source
port of redirection, while it can designate different destination ports of redirection for different classes of flows
within a source port of redirection. The same class of flow can be applied to different source ports.
19.2 Flow-based Redirection Configuration Task Sequence
1. Flow-based redirection configuration
2. Check the current flow-based redirection configuration
1. Flow-based redirection configuration
Command
Explanation
Physical Interface Configuration Mode
access-group <aclname> redirect to
interface [ethernet <IFNAME>|<IFNAME>]
no access-group <aclname> redirect
Specify flow-based redirection for the port;
the “no access-group <aclname>
redirect” command is used to delete
flow-based redirection.
2. Check the current flow-based redirection configuration
Command
Explanation
Global Mode/Admin Mode
show flow-based-redirect {interface
[ethernet <IFNAME> |<IFNAME>]}
Display the information of current
flow-based redirection in the system/port.