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NOTE: Starting in release 9.4(0.0), Dell Networking OS supports the use of multiple recursive routes with the same
source-address and destination-address combination in a redirect policy on an router.
A recursive route is a route for which the immediate next-hop address is learned dynamically through a routing protocol and
acquired through a route lookup in the routing table. The user can configure multiple recursive routes in a redirect list by
entering multiple seq redirect statements with the same source and destination address and specify a different next-hop IP
address. In this way, the recursive routes are used as different forwarding routes for dynamic failover. If the primary path goes
down and the recursive route is removed from the routing table, the seq redirect statement is ignored and the next statement
in the list with a different route is used.
PBR Exceptions (Permit)
Use the command permit to create an exception to a redirect list. Exceptions are used when a forwarding decision should be
based on the routing table rather than a routing policy.
Dell Networking OS assigns the first available sequence number to a rule configured without a sequence number and inserts the
rule into the PBR CAM region next to the existing entries. Since the order of rules is important, ensure that you configure any
necessary sequence numbers.
The permit statement is never applied because the redirect list covers all source and destination IP addresses.
Ineffective PBR Exception due to Low Sequence Number
ip redirect-list rcl0
seq 5 redirect 2.2.2.2 ip any any
seq 10 permit ip host 3.3.3.3 any
To ensure that the permit statement or PBR exception is effective, use a lower sequence number, as shown below:
ip redirect-list rcl0
seq 10 permit ip host 3.3.3.3 any
seq 15 redirect 2.2.2.2 ip any any
Apply a Redirect-list to an Interface using a Redirect-group
IP redirect lists are supported on physical interfaces as well as VLAN and port-channel interfaces.
NOTE:
When you apply a redirect-list on a port-channel, when traffic is redirected to the next hop and the destination
port-channel is shut down, the traffic is dropped. However, on the S-Series, the traffic redirected to the destination
port-channel is sometimes switched.
Use the following command inINTERFACE mode to apply a redirect list to an interface. Multiple redirect-lists can be applied to a
redirect-group. It is also possible to create two or more redirect-groups on one interface for backup purposes.
1. Apply a redirect list (policy-based routing) to an interface.
INTERFACE mode
ip redirect-group redirect-list-name
redirect-list-name is the name of a redirect list to apply to this interface. FORMAT: up to 16 characters
Delete the redirect list from this interface with the [no] ip redirect-group command.
In this example, the list “xyz” is applied to the tenGigabitEthernet 4/0 interface.
Applying a Redirect-list to an Interface Example:
Dell(conf-if-te-4/0)#ip redirect-group xyz
Dell(conf-if-te-4/0)#
Applying a Redirect-list to an Interface Example:
Dell(conf-if-te-1/0)#ip redirect-group test
Dell(conf-if-te-1/0)#ip redirect-group xyz
Dell(conf-if-te-1/0)#show config
!
interface TenGigabitEthernet 1/0
no ip address
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Policy-based Routing (PBR)