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Example: Configuring SRLG With Link Protection

This example shows how to configure SRLG with link protection without the exclude-srlg option.

Requirements

This example uses the following hardware and software components:

  • M Series, MX Series, or T Series devices
  • Junos OS Release 11.4 or later running on all the devices

Overview

In this example, PE1 is the ingress router and PE2 is the egress router. P1, P2, and P3, P4, and P5 are transit routers. OSPF is configured on all the routers as the interior gateway protocol (IGP). SRLG is configured on all seven routers. The link P1>PE2 (primary path) and the link P2>PE2 belong to SRLG srlg-a.

You configure link protection for the interface P1>PE2 by including the link-protection statement.

When SRLG srlg-a is configured on the link P1>PE2 and P2>PE2, the bypass takes the longer path P1>P4>P5>PE2, not selecting the link P2>PE2 because of the added SRLG cost for srlg-a.

Configuration

CLI Quick Configuration

To quickly configure this section of the example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI at the [edit] hierarchy level.

Router PE1

set interfaces ge-0/0/1 unit 0 family inet address 192.168.12.1/24set interfaces ge-0/0/1 unit 0 family mplsset interfaces ge-0/0/2 unit 0 family inet address 192.168.13.1/24set interfaces ge-0/0/2 unit 0 family mplsset interfaces ge-0/0/3 unit 0 family inet address 192.168.14.1/24set interfaces ge-0/0/3 unit 0 family mplsset interfaces lo0 unit 0 family inet address 10.255.0.1/32set routing-options srlg srlg-a srlg-value 101set routing-options srlg srlg-a srlg-cost 10set protocols rsvp interface ge-0/0/1.0set protocols rsvp interface ge-0/0/2.0set protocols rsvp interface ge-0/0/3.0set protocols mpls optimize-timer 120set protocols mpls label-switched-path pe1-pe2 to 10.255.0.7set protocols mpls label-switched-path pe1-pe2 link-protectionset protocols mpls label-switched-path pe1-pe2 primary via-p1set protocols mpls label-switched-path pe1-pe2 secondary path2 standbyset protocols mpls path via-p1 10.255.0.2 strictset protocols mpls path path2set protocols mpls interface ge-0/0/1.0set protocols mpls interface ge-0/0/2.0set protocols mpls interface ge-0/0/3.0set protocols ospf traffic-engineeringset protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0set protocols ospf area 0.0.0.0 interface ge-0/0/3.0set protocols ospf area 0.0.0.0 interface lo0.0

Router P1

set interfaces ge-0/0/1 unit 0 family inet address 192.168.12.2/24set interfaces ge-0/0/1 unit 0 family mplsset interfaces ge-0/0/2 unit 0 family inet address 192.168.27.2/24set interfaces ge-0/0/2 unit 0 family mplsset interfaces ge-0/0/3 unit 0 family inet address 192.168.23.2/24set interfaces ge-0/0/3 unit 0 family mplsset interfaces ge-0/0/4 unit 0 family inet address 192.168.25.2/24set interfaces ge-0/0/4 unit 0 family mplsset interfaces lo0 unit 0 family inet address 10.255.0.2/32set routing-options srlg srlg-a srlg-value 101set routing-options srlg srlg-a srlg-cost 10set protocols rsvp interface ge-0/0/1.0set protocols rsvp interface ge-0/0/2.0 link-protectionset protocols rsvp interface ge-0/0/3.0set protocols rsvp interface ge-0/0/4.0set protocols mpls interface ge-0/0/1.0set protocols mpls interface ge-0/0/2.0 srlg srlg-aset protocols mpls interface ge-0/0/3.0set protocols mpls interface ge-0/0/4.0set protocols ospf traffic-engineeringset protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0set protocols ospf area 0.0.0.0 interface ge-0/0/3.0set protocols ospf area 0.0.0.0 interface ge-0/0/4.0set protocols ospf area 0.0.0.0 interface lo0.0

Router P2

set interfaces ge-0/0/1 unit 0 family inet address 192.168.13.3/24set interfaces ge-0/0/1 unit 0 family mplsset interfaces ge-0/0/2 unit 0 family inet address 192.168.37.3/24set interfaces ge-0/0/2 unit 0 family mplsset interfaces ge-0/0/3 unit 0 family inet address 192.168.23.3/24set interfaces ge-0/0/3 unit 0 family mplsset interfaces lo0 unit 0 family inet address 10.255.0.3/32set routing-options srlg srlg-a srlg-value 101set routing-options srlg srlg-a srlg-cost 10set protocols rsvp interface ge-0/0/1.0set protocols rsvp interface ge-0/0/2.0set protocols rsvp interface ge-0/0/3.0set protocols mpls interface ge-0/0/1.0set protocols mpls interface ge-0/0/2.0 srlg srlg-aset protocols mpls interface ge-0/0/3.0set protocols ospf traffic-engineeringset protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0set protocols ospf area 0.0.0.0 interface ge-0/0/3.0set protocols ospf area 0.0.0.0 interface lo0.0

Router P3

set interfaces ge-0/0/1 unit 0 family inet address 192.168.14.4/24set interfaces ge-0/0/1 unit 0 family mplsset interfaces ge-0/0/2 unit 0 family inet address 192.168.45.4/24set interfaces ge-0/0/2 unit 0 family mplsset interfaces lo0 unit 0 family inet address 10.255.0.4/32set routing-options srlg srlg-a srlg-value 101set routing-options srlg srlg-a srlg-cost 10set protocols rsvp interface ge-0/0/1.0set protocols rsvp interface ge-0/0/2.0set protocols mpls interface ge-0/0/1.0set protocols mpls interface ge-0/0/2.0set protocols ospf traffic-engineeringset protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0set protocols ospf area 0.0.0.0 interface lo0.0

Router P4

set interfaces ge-0/0/1 unit 0 family inet address 192.168.45.5/24set interfaces ge-0/0/1 unit 0 family mplsset interfaces ge-0/0/2 unit 0 family inet address 192.168.56.5/24set interfaces ge-0/0/2 unit 0 family mplsset interfaces ge-0/0/3 unit 0 family inet address 192.168.25.5/24set interfaces ge-0/0/3 unit 0 family mplsset interfaces lo0 unit 0 family inet address 10.255.0.5/32set routing-options srlg srlg-a srlg-value 101set routing-options srlg srlg-a srlg-cost 10set protocols rsvp interface ge-0/0/1.0set protocols rsvp interface ge-0/0/2.0set protocols rsvp interface ge-0/0/3.0set protocols mpls interface ge-0/0/1.0set protocols mpls interface ge-0/0/2.0set protocols mpls interface ge-0/0/3.0set protocols ospf traffic-engineeringset protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0set protocols ospf area 0.0.0.0 interface ge-0/0/3.0set protocols ospf area 0.0.0.0 interface lo0.0

Router P5

set interfaces ge-0/0/1 unit 0 family inet address 192.168.56.6/24set interfaces ge-0/0/1 unit 0 family mplsset interfaces ge-0/0/2 unit 0 family inet address 192.168.67.6/24set interfaces ge-0/0/2 unit 0 family mplsset interfaces lo0 unit 0 family inet address 10.255.0.6/32set routing-options srlg srlg-a srlg-value 101set routing-options srlg srlg-a srlg-cost 10set protocols rsvp interface ge-0/0/1.0set protocols rsvp interface ge-0/0/2.0set protocols mpls interface ge-0/0/1.0set protocols mpls interface ge-0/0/2.0set protocols ospf traffic-engineeringset protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0set protocols ospf area 0.0.0.0 interface lo0.0

Router PE2

set interfaces ge-0/0/1 unit 0 family inet address 192.168.27.7/24set interfaces ge-0/0/1 unit 0 family mplsset interfaces ge-0/0/2 unit 0 family inet address 192.168.37.7/24set interfaces ge-0/0/2 unit 0 family mplsset interfaces ge-0/0/3 unit 0 family inet address 192.168.67.7/24set interfaces ge-0/0/3 unit 0 family mplsset interfaces lo0 unit 0 family inet address 10.255.0.7/32set routing-options srlg srlg-a srlg-value 101set routing-options srlg srlg-a srlg-cost 10set protocols rsvp interface ge-0/0/1.0set protocols rsvp interface ge-0/0/2.0set protocols rsvp interface ge-0/0/3.0set protocols mpls interface ge-0/0/1.0set protocols mpls interface ge-0/0/2.0set protocols mpls interface ge-0/0/3.0set protocols ospf traffic-engineeringset protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0set protocols ospf area 0.0.0.0 interface ge-0/0/3.0set protocols ospf area 0.0.0.0 interface lo0.0

Configuring Device PE1

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the CLI User Guide.

To configure the ingress router PE1:

  1. Configure the device interfaces.
    [edit interfaces]user@PE1# set ge-0/0/1 unit 0 family inet address 192.168.12.1/24user@PE1# set ge-0/0/1 unit 0 family mplsuser@PE1# set ge-0/0/2 unit 0 family inet address 192.168.13.1/24user@PE1# set ge-0/0/2 unit 0 family mplsuser@PE1# set ge-0/0/3 unit 0 family inet address 192.168.14.1/24user@PE1# set ge-0/0/3 unit 0 family mplsuser@PE1# set lo0 unit 0 family inet address 10.255.0.1/32
  2. Configure OSPF on the interfaces.
    [edit protocols ospf]user@PE1# set traffic-engineeringuser@PE1# set area 0.0.0.0 interface ge-0/0/1.0user@PE1# set area 0.0.0.0 interface ge-0/0/2.0user@PE1# set area 0.0.0.0 interface ge-0/0/3.0user@PE1# set area 0.0.0.0 interface lo0.0
  3. Configure the SRLG definitions.
    [edit routing-options]user@PE1# set routing-options srlg srlg-a srlg-value 101user@PE1# set routing-options srlg srlg-a srlg-cost 10
  4. Configure MPLS and the LSPs and configure link protection for the pe1-pe2 LSP.
    [edit protocols mpls]user@PE1# set interface ge-0/0/1.0user@PE1# set interface ge-0/0/2.0user@PE1# set interface ge-0/0/3.0user@PE1# set optimize-timer 120user@PE1# set label-switched-path pe1-pe2 to 10.255.0.7user@PE1# set protocols mpls label-switched-path pe1-pe2 link-protectionuser@PE1# set label-switched-path pe1-pe2 primary via-p1user@PE1# set label-switched-path pe1-pe2 secondary path2 standbyuser@PE1# set path via-p1 10.255.0.2 strictuser@PE1# set path path2
  5. Enable RSVP on the interfaces.
    [edit protocols rsvp]user@PE1# set interface ge-0/0/1.0user@PE1# set interface ge-0/0/2.0user@PE1# set interface ge-0/0/3.0

Results

From configuration mode, confirm your configuration by entering the show interfaces, show protocols ospf, show routing-options, show protocols mpls, and show protocols rsvp commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

user@PE1# show interfacesge-0/0/1 {unit 0 {family inet {address 192.168.12.1/24;}family mpls;}}ge-0/0/2 {unit 0 {family inet {address 192.168.13.1/24;}family mpls;}}ge-0/0/3 {unit 0 {family inet {address 192.168.14.1/24;}family mpls;}}lo0 {unit 0 {family inet {address 10.255.0.1/32;}}}}
user@PE1# show protocols ospftraffic-engineering;area 0.0.0.0 {interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;interface lo0.0;}
user@PE1# show protocols mplsoptimize-timer 120;label-switched-path pe1-pe2 {to 10.255.0.7;link-protection;primary via-p1;secondary path2 {standby;}}path via-p1 {10.255.0.2 strict;}path path2;interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;
user@PE1# show protocols rsvp interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;
user@PE1# show routing-optionssrlg {srlg-a {srlg-value 101;srlg-cost 10;}}

If you are done configuring the device, enter commit from configuration mode.

Configuring Device P1

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the CLI User Guide.

To configure device P1:

  1. Configure the device interfaces.
    [edit interfaces]user@P1# set ge-0/0/1 unit 0 family inet address 192.168.12.2/24user@P1# set ge-0/0/1 unit 0 family mplsuser@P1# set ge-0/0/2 unit 0 family inet address 192.168.27.2/24user@P1# set ge-0/0/2 unit 0 family mplsuser@P1# set ge-0/0/3 unit 0 family inet address 192.168.23.2/24user@P1# set ge-0/0/3 unit 0 family mplsuser@P1# set ge-0/0/4 unit 0 family inet address 192.168.25.2/24user@P1# set ge-0/0/4 unit 0 family mplsuser@P1# set lo0 unit 0 family inet address 10.255.0.2/32
  2. Configure OSPF on the interfaces.
    [edit protocols ospf]user@P1# set traffic-engineeringuser@P1# set area 0.0.0.0 interface ge-0/0/1.0user@P1# set area 0.0.0.0 interface ge-0/0/2.0user@P1# set area 0.0.0.0 interface ge-0/0/3.0user@P1# set area 0.0.0.0 interface ge-0/0/4.0user@P1# set area 0.0.0.0 interface lo0.0
  3. Configure the SRLG definitions.
    [edit routing-options]user@P1# set routing-options srlg srlg-a srlg-value 101user@P1# set routing-options srlg srlg-a srlg-cost 10
  4. Configure MPLS on the interfaces and associate the SRLG srlg-a with interface ge-0/0/2.0 for the P1>PE2 link.
    [edit protocols mpls]user@P1# set interface ge-0/0/1.0user@P1# set interface ge-0/0/2.0 srlg srlg-auser@P1# set interface ge-0/0/3.0user@P1# set interface ge-0/0/4.0
  5. Enable RSVP on the interfaces and configure link-protection for interface ge-0/0/2.0.
    [edit protocols rsvp]user@P1# set interface ge-0/0/1.0user@P1# set interface ge-0/0/2.0 link-protectionuser@P1# set interface ge-0/0/3.0user@P1# set interface ge-0/0/4.0

Results

From configuration mode, confirm your configuration by entering the show interfaces, show protocols ospf, show protocols mpls, show protocols rsvp, and show routing-options commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

user@P1# show interfacesge-0/0/1 {unit 0 {family inet {address 192.168.12.2/24;}family mpls;}}ge-0/0/2 {unit 0 {family inet {address 192.168.27.2/24;}family mpls;}}ge-0/0/3 {unit 0 {family inet {address 192.168.23.2/24;}family mpls;}}ge-0/0/4 {unit 0 {family inet {address 192.168.25.2/24;}family mpls;}}lo0 {unit 0 {family inet {address 10.255.0.2/32;}}}
user@P1# show protocols ospftraffic-engineering;area 0.0.0.0 {interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;interface ge-0/0/4.0;interface lo0.0;}
user@P1# show protocols mplsinterface ge-0/0/1.0;interface ge-0/0/2.0 {srlg srlg-a;}interface ge-0/0/3.0;interface ge-0/0/4.0;
user@P1# show protocols rsvp interface ge-0/0/1.0;interface ge-0/0/2.0 {link-protection;}interface ge-0/0/3.0;interface ge-0/0/4.0;
user@P1# show routing-optionssrlg {srlg-a {srlg-value 101;srlg-cost 10;}}

If you are done configuring the device, enter commit from configuration mode.

Configuring Device P2

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the CLI User Guide.

To configure P2:

  1. Configure the device interfaces.
    [edit interfaces]user@P2# set ge-0/0/1 unit 0 family inet address 192.168.13.3/24user@P2# set ge-0/0/1 unit 0 family mplsuser@P2# set ge-0/0/2 unit 0 family inet address 192.168.37.3/24user@P2# set ge-0/0/2 unit 0 family mplsuser@P2# set ge-0/0/3 unit 0 family inet address 192.168.23.3/24user@P2# set ge-0/0/3 unit 0 family mplsuser@P2# set lo0 unit 0 family inet address 10.255.0.3/32
  2. Configure OSPF on the interfaces.
    [edit protocols ospf]user@P2# set traffic-engineeringuser@P2# set area 0.0.0.0 interface ge-0/0/1.0user@P2# set area 0.0.0.0 interface ge-0/0/2.0user@P2# set area 0.0.0.0 interface ge-0/0/3.0user@P2# set area 0.0.0.0 interface lo0.0
  3. Configure the SRLG definitions.
    [edit routing-options]user@P2# set routing-options srlg srlg-a srlg-value 101user@P2# set routing-options srlg srlg-a srlg-cost 10
  4. Configure MPLS on the interfaces and associate the SRLG srlg-a with interface ge-0/0/2.0 for the P2>PE2 link.
    [edit protocols mpls]user@P2# set interface ge-0/0/1.0user@P2# set interface ge-0/0/2.0 srlg srlg-auser@P2# set interface ge-0/0/3.0
  5. Enable RSVP on the interfaces.
    [edit protocols rsvp]user@P2# set interface ge-0/0/1.0user@P2# set interface ge-0/0/2.0user@P2# set interface ge-0/0/3.0

Results

From configuration mode, confirm your configuration by entering the show interfaces, show protocols ospf, show protocols mpls, show protocols rsvp, and show routing-options commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

user@P2# show interfacesge-0/0/1 {unit 0 {family inet {address 192.168.13.3/24;}family mpls;}}ge-0/0/2 {unit 0 {family inet {address 192.168.37.3/24;}family mpls;}}ge-0/0/3 {unit 0 {family inet {address 192.168.23.3/24;}family mpls;}}lo0 {unit 0 {family inet {address 10.255.0.3/32;}}}}
user@P2# show protocols ospftraffic-engineering;area 0.0.0.0 {interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;interface lo0.0;}
user@P2# show protocols mplsinterface ge-0/0/1.0;interface ge-0/0/2.0 {srlg srlg-a;}interface ge-0/0/3.0;}
user@P2# show protocols rsvp interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;
user@P2# show routing-optionssrlg {srlg-a {srlg-value 101;srlg-cost 10;}}

If you are done configuring the device, enter commit from configuration mode.

Configuring Device P3

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the CLI User Guide.

To configure P3:

  1. Configure the device interfaces.
    [edit interfaces]user@P3# set ge-0/0/1 unit 0 family inet address 192.168.14.4/24user@P3# set ge-0/0/1 unit 0 family mplsuser@P3# set ge-0/0/2 unit 0 family inet address 192.168.45.4/24user@P3# set ge-0/0/2 unit 0 family mplsuser@P3# set lo0 unit 0 family inet address 10.255.0.4/32
  2. Configure OSPF on the interfaces.
    [edit protocols ospf]user@P3# set traffic-engineeringuser@P3# set area 0.0.0.0 interface ge-0/0/1.0user@P3# set area 0.0.0.0 interface ge-0/0/2.0user@P3# set area 0.0.0.0 interface lo0.0
  3. Configure the SRLG definitions.
    [edit routing-options]user@P3# set routing-options srlg srlg-a srlg-value 101user@P3# set routing-options srlg srlg-a srlg-cost 10
  4. Configure MPLS on the interfaces.
    [edit protocols mpls]user@P3# set interface ge-0/0/1.0user@P3# set interface ge-0/0/2.0
  5. Enable RSVP on the interfaces.
    [edit protocols rsvp]user@P3# set interface ge-0/0/1.0user@P3# set interface ge-0/0/2.0

Results

From configuration mode, confirm your configuration by entering the show interfaces, show protocols ospf, show protocols mpls, show protocols rsvp, and show routing-options commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

user@P3# show interfacesinterfaces {ge-0/0/1 {unit 0 {family inet {address 192.168.14.4/24;}family mpls;}}ge-0/0/2 {unit 0 {family inet {address 192.168.45.4/24;}family mpls;}}lo0 {unit 0 {family inet {address 10.255.0.4/32;}}}}
user@P3# show protocols ospftraffic-engineering;area 0.0.0.0 {interface ge-0/0/1.0;interface ge-0/0/2.0;interface lo0.0;}
user@P3# show protocols mplsinterface ge-0/0/1.0;interface ge-0/0/2.0;
user@P3# show protocols rsvp interface ge-0/0/1.0;interface ge-0/0/2.0;
user@P3# show routing-optionssrlg {srlg-a {srlg-value 101;srlg-cost 10;}}

If you are done configuring the device, enter commit from configuration mode.

Configuring Device P4

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the CLI User Guide.

To configure P4:

  1. Configure the device interfaces.
    [edit interfaces]user@P4# set ge-0/0/1 unit 0 family inet address 192.168.45.5/24user@P4# set ge-0/0/1 unit 0 family mplsuser@P4# set ge-0/0/2 unit 0 family inet address 192.168.56.5/24user@P4# set ge-0/0/2 unit 0 family mplsuser@P4# set ge-0/0/3 unit 0 family inet address 192.168.25.5/24user@P4# set ge-0/0/3 unit 0 family mplsuser@P4# set lo0 unit 0 family inet address 10.255.0.5/32
  2. Configure OSPF on the interfaces.
    [edit protocols ospf]user@P4# set traffic-engineeringuser@P4# set area 0.0.0.0 interface ge-0/0/1.0user@P4# set area 0.0.0.0 interface ge-0/0/2.0user@P4# set area 0.0.0.0 interface ge-0/0/3.0user@P4# set area 0.0.0.0 interface lo0.0
  3. Configure the SRLG definitions.
    [edit routing-options]user@P4# set routing-options srlg srlg-a srlg-value 101user@P4# set routing-options srlg srlg-a srlg-cost 10
  4. Configure MPLS on the interfaces.
    [edit protocols mpls]user@P4# set interface ge-0/0/1.0user@P4# set interface ge-0/0/2.0user@P4# set interface ge-0/0/3.0
  5. Enable RSVP on the interfaces.
    [edit protocols rsvp]user@P4# set interface ge-0/0/1.0user@P4# set interface ge-0/0/2.0user@P4# set interface ge-0/0/3.0

Results

From configuration mode, confirm your configuration by entering the show interfaces, show protocols ospf, show protocols mpls, show protocols rsvp, and show routing-options commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

user@P4# show interfacesge-0/0/1 {unit 0 {family inet {address 192.168.45.5/24;}family mpls;}}ge-0/0/2 {unit 0 {family inet {address 192.168.56.5/24;}family mpls;}}ge-0/0/3 {unit 0 {family inet {address 192.168.25.5/24;}family mpls;}}lo0 {unit 0 {family inet {address 10.255.0.5/32;}}}
user@P4# show protocols ospftraffic-engineering;area 0.0.0.0 {interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;interface lo0.0;}
user@P4# show protocols mplsinterface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;
user@P4# show protocols rsvp interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;
user@P4# show routing-optionssrlg {srlg-a {srlg-value 101;srlg-cost 10;}}

If you are done configuring the device, enter commit from configuration mode.

Configuring Device P5

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the CLI User Guide.

To configure P5:

  1. Configure the device interfaces.
    [edit interfaces]user@P5# set ge-0/0/1 unit 0 family inet address 192.168.56.6/24user@P5# set ge-0/0/1 unit 0 family mplsuser@P5# set ge-0/0/2 unit 0 family inet address 192.168.67.6/24user@P5# set ge-0/0/2 unit 0 family mplsuser@P5# set lo0 unit 0 family inet address 10.255.0.6/32
  2. Configure OSPF on the interfaces.
    [edit protocols ospf]user@P5# set traffic-engineeringuser@P5# set area 0.0.0.0 interface ge-0/0/1.0user@P5# set area 0.0.0.0 interface ge-0/0/2.0user@P5# set area 0.0.0.0 interface lo0.0
  3. Configure the SRLG definitions.
    [edit routing-options]user@P5# set routing-options srlg srlg-a srlg-value 101user@P5# set routing-options srlg srlg-a srlg-cost 10
  4. Configure MPLS on the interfaces.
    [edit protocols mpls]user@P5# set interface ge-0/0/1.0user@P5# set interface ge-0/0/2.0
  5. Enable RSVP on the interfaces.
    [edit protocols rsvp]user@P5# set interface ge-0/0/1.0user@P5# set interface ge-0/0/2.0

Results

From configuration mode, confirm your configuration by entering the show interfaces, show protocols ospf, show protocols mpls, show protocols rsvp, and show routing-options commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

user@P5# show interfacesge-0/0/1 {unit 0 {family inet {address 192.168.56.6/24;}family mpls;}}ge-0/0/2 {unit 0 {family inet {address 192.168.67.6/24;}family mpls;}}lo0 {unit 0 {family inet {address 10.255.0.6/32;}}}
user@P5# show protocols ospftraffic-engineering;area 0.0.0.0 {interface ge-0/0/1.0;interface ge-0/0/2.0;interface lo0.0;}
user@P5# show protocols mplsinterface ge-0/0/1.0;interface ge-0/0/2.0;
user@P5# show protocols rsvp interface ge-0/0/1.0;interface ge-0/0/2.0;
user@P5# show routing-optionssrlg {srlg-a {srlg-value 101;srlg-cost 10;}}

If you are done configuring the device, enter commit from configuration mode.

Configuring Device PE2

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see the CLI User Guide.

To configure PE2:

  1. Configure the device interfaces.
    [edit interfaces]user@PE2# set ge-0/0/1 unit 0 family inet address 192.168.27.7/24user@PE2# set ge-0/0/1 unit 0 family mplsuser@PE2# set ge-0/0/2 unit 0 family inet address 192.168.37.7/24user@PE2# set ge-0/0/2 unit 0 family mplsuser@PE2# set ge-0/0/3 unit 0 family inet address 192.168.67.7/24user@PE2# set ge-0/0/3 unit 0 family mplsuser@PE2# set lo0 unit 0 family inet address 10.255.0.7/32
  2. Configure OSPF on the interfaces.
    [edit protocols ospf]user@PE2# set traffic-engineeringuser@PE2# set area 0.0.0.0 interface ge-0/0/1.0user@PE2# set area 0.0.0.0 interface ge-0/0/2.0user@PE2# set area 0.0.0.0 interface ge-0/0/3.0user@PE2# set area 0.0.0.0 interface lo0.0
  3. Configure the SRLG definitions.
    [edit routing-options]user@PE2# set routing-options srlg srlg-a srlg-value 101user@PE2# set routing-options srlg srlg-a srlg-cost 10
  4. Configure MPLS on the interfaces.
    [edit protocols mpls]user@PE2# set interface ge-0/0/1.0user@PE2# set interface ge-0/0/2.0user@PE2# set interface ge-0/0/3.0
  5. Enable RSVP on the interfaces.
    [edit protocols rsvp]user@PE2# set interface ge-0/0/1.0user@PE2# set interface ge-0/0/2.0user@PE2# set interface ge-0/0/3.0

Results

From configuration mode, confirm your configuration by entering the show interfaces, show protocols ospf, show protocols mpls, show protocols rsvp, and show routing-options commands. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration.

user@PE2# show interfacesinterfaces {ge-0/0/1 {unit 0 {family inet {address 192.168.27.7/24;}family mpls;}}ge-0/0/2 {unit 0 {family inet {address 192.168.37.7/24;}family mpls;}}ge-0/0/3 {unit 0 {family inet {address 192.168.67.7/24;}family mpls;}}lo0 {unit 0 {family inet {address 10.255.0.7/32;}}}}
user@PE2# show protocols ospftraffic-engineering;area 0.0.0.0 {interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;interface lo0.0;}
user@PE2# show protocols mplsinterface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;
user@PE2# show protocols rsvp interface ge-0/0/1.0;interface ge-0/0/2.0;interface ge-0/0/3.0;
user@PE2# show routing-optionssrlg {srlg-a {srlg-value 101;srlg-cost 10;}}

If you are done configuring the device, enter commit from configuration mode.

Verification

Confirm that the configuration is working properly.

Verifying the SRLG Cost Is Added to the TE Link

Purpose

Verify that the SRLG cost is added to the TE link if it belongs to the SRLG of the protected link. Issue the show ted link detail and show rsvp session extensive bypass commands on device P1.

Action

user@P1> show ted link detail 
...
10.255.0.2->192.168.27.7-1, Local: 192.168.27.2, Remote: 0.0.0.0
  Local interface index: 0, Remote interface index: 0
  LocalPath: 0, Metric: 1, StaticBW: 1000Mbps, AvailBW: 1000Mbps
      Color: 0 <none>
  SRLGs: srlg-a
  localBW [0] 0bps  [1] 0bps  [2] 0bps  [3] 0bps
  localBW [4] 0bps  [5] 0bps  [6] 0bps  [7] 0bps
[...]
10.255.0.3->192.168.37.7-1, Local: 192.168.37.3, Remote: 0.0.0.0
  Local interface index: 0, Remote interface index: 0
  LocalPath: 0, Metric: 1, StaticBW: 1000Mbps, AvailBW: 1000Mbps
      Color: 0 <none>
  SRLGs: srlg-a
  localBW [0] 0bps  [1] 0bps  [2] 0bps  [3] 0bps
  localBW [4] 0bps  [5] 0bps  [6] 0bps  [7] 0bps
...
user@P1> show rsvp session extensive bypass 
Ingress RSVP: 1 sessions

10.255.0.7
  From: 10.255.0.2, LSPstate: Up, ActiveRoute: 0
  LSPname: Bypass->192.168.27.7
  LSPtype: Static Configured
  Suggested label received: -, Suggested label sent: -
  Recovery label received: -, Recovery label sent: 299776
  Resv style: 1 SE, Label in: -, Label out: 299776
  Time left:    -, Since: Fri Oct 21 13:19:21 2011
  Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
  Port number: sender 1 receiver 52081 protocol 0
  Type: Bypass LSP
    Number of data route tunnel through: 1
    Number of RSVP session tunnel through: 0
  PATH rcvfrom: localclient
  Adspec: sent MTU 1500
  Path MTU: received 1500
  PATH sentto: 192.168.25.5 (ge-0/0/4.0) 26 pkts
  RESV rcvfrom: 192.168.25.5 (ge-0/0/4.0) 26 pkts
  Explct route: 192.168.25.5 192.168.56.6 192.168.67.7
  Record route: <self> 192.168.25.5 192.168.56.6 192.168.67.7
Total 1 displayed, Up 1, Down 0

Meaning

The shortest path for the bypass protecting the link P1->PE2 would have been P1->P2->PE2. Because the links P1>PE2 and P2>PE2 both belong to SRLG srlg-a, the SRLG cost of 10 for srlg-a is added to the metric for the link P2>PE2. This makes the metric for the link P2>PE2 too high to be selected for the shortest path. Therefore, the CSPF result for the computed path for the bypass becomes P1>P4>P5>PE2.

 

Related Documentation

 

Published: 2012-11-29

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