Cabletron Systems SSIM-R8-02 Specifications Page 248

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Configuring IP Policies
228 Enterasys Xpedition User Reference Manual
For example, you can set up an IP policy to send packets originating from a certain
network through a firewall, while letting other packets bypass the firewall. Sites that have
multiple Internet service providers can use IP policies to assign user groups to particular
ISPs. You can also create IP policies to select service providers based on various traffic
types.
Configuring IP Policies
To implement an IP policy, you first create a profile for the packets to be forwarded using
an IP policy. For example, you can create a profile defined as all telnet packets going from
network 9.1.0.0/16 to network 15.1.0.0/16. You then associate the profile with an IP
policy. The IP policy specifies what to do with the packets that match the profile. For
example, you can create an IP policy that sends packets matching a given profile to next-
hop gateway 100.1.1.1.
Configuring an IP policy consists of the following tasks:
Defining a profile
Associating the profile with a policy
Applying the IP policy to an interface
Defining an ACL Profile
An ACL profile specifies the criteria packets must meet to be eligible for IP policy routing.
You define profiles with the acl command. For IP policy routing, the XP uses the packet-
related information from the acl command and ignores the other fields.
For example, the following acl command creates a profile called prof1 for telnet packets
going from network 9.1.1.5 to network 15.1.1.2:
See the Enterasys Xpedition Command Line Interface Reference Manual for complete syntax
information for the acl command.
Note: ACLs for non-IP protocols cannot be used for IP policy routing.
Associating the Profile with an IP Policy
Once you have defined a profile with the acl command, you associate the profile with an
IP policy by entering one or more ip-policy statements. An ip-policy statement specifies
the next-hop gateway (or gateways) where packets matching a profile are forwarded. (See
the Enterasys Xpedition Command Line Interface Reference Manual for complete syntax
information for the ip-policy command.)
ssr(config)# acl prof1 permit ip 9.1.0.0/16 15.1.0.0/16 any any telnet 0
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