SRv6 Configuration¶

This section covers Segment Routing over IPv6 (SRv6) configuration in FloofOS.

Overview¶

SRv6 is a modern source routing architecture that leverages IPv6 extension headers to encode routing information in the packet. Benefits include:

Native IPv6 operation
No additional encapsulation overhead
Network programming with SRv6 functions
Traffic Engineering
Network slicing

SRv6 Components¶

Component	Description
SID	Segment Identifier (IPv6 address)
Local SID	SID processed locally by this node
SRv6 Policy	Ordered list of segments
Steering	Directing traffic into SRv6 policies

View SRv6 Configuration¶

Show Local SIDs¶

show sr localsids

Show SRv6 Policies¶

show sr policies

Show Steering Policies¶

show sr steering-policies

Configure Local SID¶

Local SIDs define how packets with matching destination SID are processed.

Syntax¶

sr localsid address <sid> behavior <behavior> [parameters]

SRv6 Behaviors¶

Behavior	Description
`end`	Endpoint (pop segment, forward)
`end.x <next-hop> <if>`	Endpoint with Layer 3 cross-connect
`end.dx4 <next-hop>`	Endpoint with decapsulation (IPv4)
`end.dx6 <next-hop>`	Endpoint with decapsulation (IPv6)
`end.dt4 <vrf>`	Endpoint with decap and VRF lookup (IPv4)
`end.dt6 <vrf>`	Endpoint with decap and VRF lookup (IPv6)
`end.dx2 <if>`	Endpoint with L2 cross-connect

Example: End (Transit Node)¶

sr localsid address fc00:1::1 behavior end
commit

Example: End.DX4 (Decapsulate to IPv4)¶

sr localsid address fc00:1::100 behavior end.dx4 192.168.1.1 GE12/0/0
commit

Example: End.DT4 (Decapsulate to IPv4 VRF)¶

sr localsid address fc00:1::200 behavior end.dt4 vrf-id 100
commit

Delete Local SID¶

sr localsid del address fc00:1::1
commit

Configure SRv6 Policy¶

SRv6 policies define a path through the network as a list of segments.

Syntax¶

sr policy add bsid <bsid> next <sid> [next <sid> ...] [weight <n>] [fib-table <id>]

Parameters¶

Parameter	Description
`bsid`	Binding SID (local identifier for policy)
`next`	Segment in the path (can be repeated)
`weight`	ECMP weight
`fib-table`	VRF table ID

Example: Simple Policy¶

sr policy add bsid fc00:1::999 next fc00:2::1 next fc00:3::1
commit

Example: Multi-Path Policy¶

sr policy add bsid fc00:1::999 next fc00:2::1 next fc00:3::1 weight 1
sr policy mod bsid fc00:1::999 add sl next fc00:4::1 next fc00:3::1 weight 1
commit

Delete Policy¶

sr policy del bsid fc00:1::999
commit

Traffic Steering¶

Steer traffic into SRv6 policies based on destination prefix.

Syntax¶

sr steer l3 <prefix> via bsid <bsid> [fib-table <id>]

Example: Steer IPv6 Traffic¶

sr steer l3 2001:db8:100::/48 via bsid fc00:1::999
commit

Example: Steer IPv4 Traffic¶

sr steer l3 192.168.100.0/24 via bsid fc00:1::999
commit

Delete Steering¶

sr steer del l3 2001:db8:100::/48 via bsid fc00:1::999
commit

SRv6 Network Example¶

Topology¶

                   SID: fc00:2::1
                       +----+
          +------------|  R2  |-------------+
          |            +----+              |
          |                                 |
      +---+---+                         +---+---+
      |  R1   |                         |  R3   |
      |fc00:1::1                       |fc00:3::1
      +---+---+                         +---+---+
          |                                 |
     192.168.1.0/24                   192.168.100.0/24

R1 Configuration (Ingress)¶

# Configure local SID
sr localsid address fc00:1::1 behavior end

# Create policy to reach R3 via R2
sr policy add bsid fc00:1::999 next fc00:2::1 next fc00:3::100

# Steer traffic to 192.168.100.0/24 into policy
sr steer l3 192.168.100.0/24 via bsid fc00:1::999

commit

R2 Configuration (Transit)¶

# Configure local SID for transit
sr localsid address fc00:2::1 behavior end

commit

R3 Configuration (Egress)¶

# Configure local SID with decapsulation
sr localsid address fc00:3::1 behavior end
sr localsid address fc00:3::100 behavior end.dx4 192.168.100.1 GE12/0/1

commit

SRv6 Encapsulation Settings¶

Set Encapsulation Source Address¶

set sr encaps source addr fc00:1::1
commit

Show Encapsulation Settings¶

show sr encaps

Troubleshooting¶

Verify Local SIDs¶

show sr localsids

Verify Policies¶

show sr policies

Verify Steering¶

show sr steering-policies

Check IPv6 FIB for SIDs¶

show ip6 fib fc00:1::1

Command Reference¶

Command	Description
`show sr localsids`	Display local SIDs
`show sr policies`	Display SRv6 policies
`show sr steering-policies`	Display steering policies
`sr localsid address <sid> behavior <b>`	Configure local SID
`sr localsid del address <sid>`	Delete local SID
`sr policy add bsid <bsid> next <sid>`	Create SRv6 policy
`sr policy del bsid <bsid>`	Delete SRv6 policy
`sr steer l3 <prefix> via bsid <bsid>`	Steer traffic to policy
`sr steer del l3 <prefix>`	Delete steering
`set sr encaps source addr <ip>`	Set encap source address