sr-te frr enable

Function

The sr-te frr enable command enables protection during SRv6 forwarding. The sr-te frr enable downgrade command enables FRR switching to the BE mode.

The undo sr-te frr enable command disables protection during SRv6 forwarding.

By default, protection during SRv6 forwarding is disabled.

Format

sr-te frr enable [ downgrade ]

undo sr-te frr enable [ downgrade ]

Parameters

Parameter	Description	Value
downgrade	Switches the FRR mode.	-

Parameter

Description

Value

downgrade

Switches the FRR mode.

Views

Segment routing IPv6 view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
segr	write

Usage Guidelines

Usage Scenario

You can run the sr-te frr enable command to enable protection during SRv6 forwarding. With this function enabled, if the value of the SL field in a packet is greater than 0 or the value of the SL field in a packet with an SRH is 0, the device decreases the value by 1 and uses the next-layer SRv6 SID as the destination address to prevent packet forwarding failures in any of the following scenarios:

No available route is found due to a FIB-Miss error.
The IPv6 DA is the address of a local interface, the outbound interface is down, and TI-LFA FRR does not provide node protection.
The local SID is an End.X SID, and the outbound interface is down.
The route queried from the involved routing table is a NULL0 route.
The downgrade parameter switches the protection mode to SRv6 BE and uses the last SID as the destination address for forwarding.

Precautions

TE FRR is supported during forwarding as long as the sr-te frr enable command is run in one VS.
TE FRR is not supported during forwarding only after the undo sr-te frr enable command is run in all VSs.

Example

# Enable BE mode protection during SRv6 forwarding.

<HUAWEI> system-view
[~HUAWEI] segment-routing ipv6
[*HUAWEI-segment-routing-ipv6] sr-te frr enable downgrade

# Enable protection during SRv6 forwarding.

<HUAWEI> system-view
[~HUAWEI] segment-routing ipv6
[*HUAWEI-segment-routing-ipv6] sr-te frr enable