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Explain the definition of tunnel interface and mpls te

sjrcoel
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Spotlight
Hello, I am operating ASR9k, but it is difficult to understand tunnel interface and MPLS-TE. Please refer to the configuration below and explain it.

configure terminal
!
interface tunnel-te401
description A
ipv4 unnumbered Loopback0
load-interval 30
autoroute announce
!
destination 178.25.51.225
fast-reroute protect node
record-route
path-option 1 dynamic ospf 10 area 330
logging events link-status
!
mpls traffic-eng
interface TenGigE0/1/0/10
auto-tunnel backup
!
interface TenGigE0/3/0/2.330
auto-tunnel backup
!
interface TenGigE0/3/0/3.330
auto-tunnel backup
!
interface TenGigE0/4/0/2.330
auto-tunnel backup
!
interface TenGigE0/4/0/3.330
auto-tunnel backup
!
show configuration
!
commit confirmed minutes 2
!
commit

 

1 Accepted Solution

Accepted Solutions

M02@rt37
VIP
VIP

Hello @sjrcoel,

Regarding your configuration:

interface tunnel-te401


- This command creates a tunnel interface with the name "tunnel-te401".

-`ipv4 unnumbered Loopback0` indicates that the tunnel interface will use the IPv4 address assigned to Loopback0 as its source IP address.
- `load-interval 30` sets the load interval to 30 seconds.
- `autoroute announce` enables the automatic announcement of the tunnel to other routers.

destination 178.25.51.225


- This command specifies the destination IP address (178.25.51.225) for the tunnel.
- `fast-reroute protect node` configures fast reroute protection at the node level.
- `record-route` instructs the router to record the path the traffic takes in the tunnel.

path-option 1 dynamic ospf 10 area 330


- This command defines a dynamic path option (path-option 1) for the tunnel.
- It specifies that OSPF with process ID 10 and area 330 will be used to determine the path for the tunnel.

mpls traffic-eng


- This command enters MPLS Traffic Engineering configuration mode.

interface TenGigE0/1/0/10', 'interface TenGigE0/3/0/2.330', 'interface TenGigE0/3/0/3.330', 'interface TenGigE0/4/0/2.330', 'interface TenGigE0/4/0/3.330


- These commands configure specific interfaces, indicating that they are candidates for auto-tunnel backup.

-->Your configuration sets up an MPLS-TE tunnel interface named "tunnel-te401." The tunnel uses Loopback0 as the source IP address and has fast reroute protection, automatic route announcements, and a dynamic path option determined by OSPF in area 330. Several interface are configured as candidate for auto-tunnel backup, which can be used as backup paths for the MPLS-TE tunnel.

 

Best regards
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View solution in original post

1 Reply 1

M02@rt37
VIP
VIP

Hello @sjrcoel,

Regarding your configuration:

interface tunnel-te401


- This command creates a tunnel interface with the name "tunnel-te401".

-`ipv4 unnumbered Loopback0` indicates that the tunnel interface will use the IPv4 address assigned to Loopback0 as its source IP address.
- `load-interval 30` sets the load interval to 30 seconds.
- `autoroute announce` enables the automatic announcement of the tunnel to other routers.

destination 178.25.51.225


- This command specifies the destination IP address (178.25.51.225) for the tunnel.
- `fast-reroute protect node` configures fast reroute protection at the node level.
- `record-route` instructs the router to record the path the traffic takes in the tunnel.

path-option 1 dynamic ospf 10 area 330


- This command defines a dynamic path option (path-option 1) for the tunnel.
- It specifies that OSPF with process ID 10 and area 330 will be used to determine the path for the tunnel.

mpls traffic-eng


- This command enters MPLS Traffic Engineering configuration mode.

interface TenGigE0/1/0/10', 'interface TenGigE0/3/0/2.330', 'interface TenGigE0/3/0/3.330', 'interface TenGigE0/4/0/2.330', 'interface TenGigE0/4/0/3.330


- These commands configure specific interfaces, indicating that they are candidates for auto-tunnel backup.

-->Your configuration sets up an MPLS-TE tunnel interface named "tunnel-te401." The tunnel uses Loopback0 as the source IP address and has fast reroute protection, automatic route announcements, and a dynamic path option determined by OSPF in area 330. Several interface are configured as candidate for auto-tunnel backup, which can be used as backup paths for the MPLS-TE tunnel.

 

Best regards
.ı|ı.ı|ı. If This Helps, Please Rate .ı|ı.ı|ı.
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