redirect ip-multihop

Function

The redirect ip-multihop command configures an action of redirecting packets to multiple next hop IP addresses in a traffic behavior.

The undo redirect command deletes the redirection configuration.

By default, an action of redirecting packets to multiple next hop IP addresses is not configured in a traffic behavior.

Product	Support
S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S	Supported
S2720-EI, S5720I-SI, S5720-LI, S5735-L, S5735S-L, S5735S-L-M, S5720S-LI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730S-EI, S5730-SI, S6720-LI, S6720S-LI, S6720S-SI, and S6720-SI	Not supported

Format

redirect [ vpn-instance vpn-instance-name ] ip-multihop { nexthop ip-address } &<2-4>

redirect [ vpn-instance vpn-instance-name ] ip-multihop acl-ip-pool-name

Parameters

Parameter	Description	Value
vpn-instance vpn-instance-name	Specifies the name of a VPN instance.	The value must be an existing VPN instance name.
nexthop ip-address	Specifies the IP address of the next hop.	The value is in dotted decimal notation and in X.X.X.X format.
acl-ip-pool-name	Specifies the name of an ACL IP address pool.	The ACL IP address pool name must exist.

Views

Traffic behavior view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If multiple next hop IP addresses are specified, the device redirects packets through equal-cost routes in load balancing mode.

If the outbound interface corresponding to a next hop IP address becomes Down or a route changes, the device switches traffic to the outbound interface corresponding to an available next hop. If the specified next hops are unavailable, the device forwards the packets to the original destination.

Follow-up Procedure

Run the traffic policy command to create a traffic policy and run the classifier behavior command in the traffic policy view to bind the traffic classifier to the traffic behavior containing redirection to multiple next hop IP addresses.

Precautions

In a traffic behavior, the redirect ip-multihop command cannot be used together with any of the following commands: remark 8021p, add-tag vlan-id, remark cvlan-id and remark vlan-id.
A traffic policy containing the redirection action can be only used globally, on an interface, or in a VLAN in the inbound direction.
If you configure only two identical IP addresses when executing the redirect ip-multihop command, the system displays the following error message:
```
Error: Redirect ip-multihop should configure at least two address.
```
If the device has no ARP entry matching the specified next hop IP address, the redirect ip-multihop command can be used but redirection does not take effect. The device still forwards packets to the original destination until the device has the corresponding ARP entry.

Example

# Configure three next hop IP addresses in the traffic behavior b1: 10.1.42.1, 10.2.12.3, and 10.1.1.2.

<HUAWEI> system-view
[HUAWEI] traffic behavior b1
[HUAWEI-behavior-b1] redirect ip-multihop nexthop 10.1.42.1 nexthop 10.2.12.3 nexthop 10.1.1.2

# In the traffic behavior b2, configure the action of redirecting packets to five next hop IP addresses in the ACL IP address pool abc.

<HUAWEI> system-view
[HUAWEI] acl ip-pool abc
[HUAWEI-acl-ip-pool-abc] ip address 192.168.10.1 32
[HUAWEI-acl-ip-pool-abc] ip address 192.168.20.1 32
[HUAWEI-acl-ip-pool-abc] ip address 192.168.30.1 32
[HUAWEI-acl-ip-pool-abc] ip address 192.168.40.1 32
[HUAWEI-acl-ip-pool-abc] ip address 192.168.50.1 32
[HUAWEI-acl-ip-pool-abc] quit
[HUAWEI] traffic behavior b2
[HUAWEI-behavior-b2] redirect ip-multihop abc