Prerequisites

Ensure the following prerequisites are met before configuring RSVP Auto Bypass functionality:

Define Interfaces and Loopback Addresses

Configure Layer 2 interfaces, such as port channel interfaces (e.g., po1), and assign specific IP addresses for proper identification, and routing. Additionally, assign loopback IP addresses to establish essential points of connectivity. These configurations establish the efficient network routing and communication.

!
interface lo
 ip address 127.0.0.1/8
 ip address 135.1.1.27/32 secondary
 ipv6 address ::1/128
!
interface po6
 ip address 1.1.2.2/30
!
interface xe6
 channel-group 6 mode active
!

Configure IGP for Dynamic Routing

Enable ISIS to facilitate dynamic routing on all nodes within the network. Define ISIS router instances to match loopback IP addresses and add network segments to ISIS areas for proper route distribution. Set up neighbor relationships using loopback IP addresses, ensuring efficient route advertisement and convergence for optimal network performance.

ISIS Configuration

!
router isis 1
 is-type level-2-only
 metric-style wide
 mpls traffic-eng router-id 135.1.1.27
 mpls traffic-eng level-2
 capability cspf
 dynamic-hostname
 fast-reroute ti-lfa level-2 proto ipv4
 net 49.0000.0000.0027.00
 passive-interface lo
!
interface po6
 isis network point-to-point
 ip router isis 1
!

OSPF Configuration

!
router ospf 100
 ospf router-id 135.1.1.27
 network 135.1.1.27/32 area 0.0.0.0
 network 1.1.5.1/24 area 0.0.0.0
 network 1.1.1.1/24 area 0.0.0.0
!

Configure RSVP for Efficient Network Operation

Enable Resource Reservation Protocol (RSVP) on all nodes to optimize traffic routing and quality of service. RSVP reserves network resources along specified paths to enhance network performance and reliability.

!
router rsvp
!
interface xe1
 label-switching
 enable-rsvp
!

Configure the RSVP Primary Path and Trunk

Establish a trunk on edge routers participating in label-switching using defined path.

!
rsvp-path PE1-PE4-1 mpls
 1.1.1.2 strict
 1.1.2.1 strict
 1.1.6.1 strict
!
rsvp-trunk PE1-PE4-1 ipv4
 primary fast-reroute protection facility
 primary fast-reroute node-protection
 primary path PE1-PE4-1
 from 135.1.1.27
 to 135.1.1.44
!