Manual

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106
Chapter 13 Flow-based Redirection
13.1 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.
13.2 Flow-based Redirection Configuration Task Sequence
Flow-based redirection configuration
Check the current flow-based redirection configuration
1. Flow-based redirection configuration
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.
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.