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Table of Contents Expand all

play_arrow Overview
- Traffic Sampling, Forwarding, and Monitoring Overview
play_arrow Collecting Traffic Samples for Network Monitoring
play_arrow Configuring Traffic Forwarding for Network Monitoring
play_arrow Configuring Forwarding Table Filters to Efficiently Route Traffic
play_arrow Configuring Forwarding Options for Load Balancing Traffic
play_arrow Configuring Other Forwarding Options
play_arrow Configuration Statements and Operational Commands
- Junos CLI Reference Overview

list Table of Contents

English

Example: Configuring Multicast Load Balancing over Aggregated Ethernet Links

date_range 24-Nov-23

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This example shows how to configure point-to-multipoint LSPs to load balance across aggregated Ethernet links. The load balancing applies to all traffic types, including multicast. Feature parity for multicast load balancing of point-to-multipoint LSPs over aggregated Ethernet child links on the MX Series routers with MPCs or MICs is supported in Junos OS Releases 11.1R2, 11.2R2, and 11.4.

Note:

VPLS multicast load balancing requires Junos OS Release 14.1 or later.

Requirements

Before you begin:

Configure the router interfaces.
Configure an interior gateway protocol or static routing. See the Junos OS Routing Protocols Library for Routing Devices.

Overview

This example shows a sample topology and configuration to perform the following tasks:

Load balancing VPLS multicast traffic over link aggregation
Load balancing point-to-multipoint multicast traffic over link aggregation
Re-load balancing after a change in the next-hop topology

Next-hop topology changes might include but are not limited to:
- Layer 2 membership change in the link aggregation
- Indirect next-hop change
- Composite next-hop change

Load balancing is hash-based, so the higher the number of flows, the better. As is the case with unicast, you can also configure the hash key to be based on Layer 3 and Layer 4 information to achieve a better load-balancing result. There are a few exceptions that are specific to multicast traffic, which might lead to uneven load balancing—for example, when the outgoing interface list includes multiple aggregated interfaces with an unequal number of child links.

Note:

For Draft Rosen multicast VPNs (MVPNs), load balancing over aggregated Ethernet interfaces is uneven when the LAGs are all core interfaces. In the case of Next-Generation MBGP MPVNs, multicast traffic is sent over point-to-multipoint and RSVP, and the hash is computed up to the IP headers. In the Draft Rosen case, multicast traffic is tunneled over GRE tunnels, and the hash is used only on GRE tunnel headers. This is why load balancing is not even for Draft Rosen when the LAGs are all core interfaces.

Topology

Figure 1 shows the topology for this example. The example includes the configuration for Devices PE1 and PE2.

Figure 1: Multicast Load Balancing over Aggregated Ethernet Links

Procedure

CLI Quick Configuration
Step-by-Step Procedure
Step-by-Step Procedure

CLI Quick Configuration

To quickly configure this 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.

Device PE1

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[edit]
set forwarding-options hash-key family multiservice source-mac 
set forwarding-options hash-key family multiservice destination-mac 
set forwarding-options hash-key family multiservice payload ip layer-3 
set interfaces ge-0/0/6 gigether-options 802.3ad ae0 
set interfaces ge-0/1/6 gigether-options 802.3ad ae0 
set interfaces ge-0/2/2 encapsulation ethernet-vpls 
set interfaces ge-0/2/2 unit 0 family vpls 
set interfaces ge-0/2/3 gigether-options 802.3ad ae0 
set interfaces ge-0/2/6 gigether-options 802.3ad ae0 
set interfaces ge-0/3/0 gigether-options 802.3ad ae0 
set interfaces ge-0/3/1 gigether-options 802.3ad ae0 
set interfaces ge-0/3/6 gigether-options 802.3ad ae0 
set interfaces ge-1/0/6 gigether-options 802.3ad ae0 
set interfaces ge-1/2/6 unit 0 family inet address 10.13.1.2/30 
set interfaces ae0 unit 0 family inet address 10.11.11.1/30 
set interfaces ae0 unit 0 family iso 
set interfaces ae0 unit 0 family mpls 
set policy-options policy-statement exp-to-fwd term a from community grn-com 
set policy-options policy-statement exp-to-fwd term a then install-nexthop lsp PE1-to-PE2 
set policy-options policy-statement exp-to-fwd term a then accept 
set policy-options community grn-com members target:65000:1 
set protocols rsvp interface all 
set protocols rsvp interface fxp0.0 disable 
set protocols mpls label-switched-path PE1-to-PE2 to 10.255.19.77 
set protocols mpls label-switched-path PE1-to-PE3 to 10.255.19.79 
set protocols mpls interface all 
set protocols mpls interface fxp0.0 disable 
set protocols bgp group int type internal 
set protocols bgp group int local-address 10.255.71.214 
set protocols bgp group int family inet any 
set protocols bgp group int family l2vpn signaling 
set protocols bgp group int neighbor 10.255.19.77 
set protocols bgp group int neighbor 10.255.19.79 
set protocols ospf traffic-engineering 
set protocols ospf area 0.0.0.0 interface all 
set protocols ospf area 0.0.0.0 interface fxp0.0 disable 
set routing-instances vpls instance-type vpls 
set routing-instances vpls interface ge-0/2/2.0 
set routing-instances vpls route-distinguisher 65000:1 
set routing-instances vpls vrf-target target:65000:1 
set routing-instances vpls protocols vpls site-range 3 
set routing-instances vpls protocols vpls no-tunnel-services 
set routing-instances vpls protocols vpls site asia site-identifier 1 
set routing-instances vpls protocols vpls site asia interface ge-0/2/2.0 
set routing-instances vpls protocols vpls vpls-id 100
set routing-instances vpls protocols vpls bum-hashing

Device PE2

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set interfaces ge-0/0/7 gigether-options 802.3ad ae0 
set interfaces ge-0/1/7 gigether-options 802.3ad ae0 
set interfaces ge-0/2/3 gigether-options 802.3ad ae0 
set interfaces ge-0/2/7 gigether-options 802.3ad ae0 
set interfaces ge-2/0/0 gigether-options 802.3ad ae1 
set interfaces ge-2/0/1 gigether-options 802.3ad ae1 
set interfaces ge-2/0/2 gigether-options 802.3ad ae1 
set interfaces ge-2/0/4 encapsulation ethernet-vpls 
set interfaces ge-2/0/4 unit 0 family vpls 
set interfaces ge-2/0/7 gigether-options 802.3ad ae0 
set interfaces ge-2/0/9 unit 0 family inet address 10.10.1.1/30 
set interfaces ge-2/0/9 unit 0 family mpls 
set interfaces ge-2/1/7 gigether-options 802.3ad ae0 
set interfaces ge-2/2/7 gigether-options 802.3ad ae0 
set interfaces ge-2/3/7 gigether-options 802.3ad ae0 
set interfaces ae0 unit 0 family inet address 10.11.11.2/30 
set interfaces ae0 unit 0 family iso 
set interfaces ae0 unit 0 family mpls 
set interfaces ae1 unit 0 family inet address 10.1.1.1/30 
set interfaces ae1 unit 0 family mpls 
set protocols rsvp interface all 
set protocols rsvp interface fxp0.0 disable 
set protocols mpls label-switched-path PE2-to-PE3 from 10.255.19.77 
set protocols mpls label-switched-path PE2-to-PE3 to 10.255.19.79 
set protocols mpls label-switched-path PE2-to-PE1 to 10.255.71.214 
set protocols mpls interface all 
set protocols mpls interface fxp0.0 disable 
set protocols bgp group int type internal 
set protocols bgp group int local-address 10.255.19.77 
set protocols bgp group int family inet any 
set protocols bgp group int family l2vpn signaling 
set protocols bgp group int neighbor 10.255.71.214 
set protocols bgp group int neighbor 10.255.19.79 
set protocols ospf traffic-engineering 
set protocols ospf area 0.0.0.0 interface lo0.0 
set protocols ospf area 0.0.0.0 interface ge-2/0/0.0 
set protocols ospf area 0.0.0.0 interface ge-2/0/1.0 
set protocols ospf area 0.0.0.0 interface ge-2/0/2.0 
set protocols ospf area 0.0.0.0 interface ae0.0 
set protocols ospf area 0.0.0.0 interface ae1.0 
set protocols ospf area 0.0.0.0 interface all 
set protocols ospf area 0.0.0.0 interface fxp0.0 disable 
set protocols ldp interface all 
set protocols ldp interface fxp0.0 disable 
set routing-instances vpls instance-type vpls 
set routing-instances vpls interface ge-2/0/4.0 
set routing-instances vpls route-distinguisher 65000:1 
set routing-instances vpls vrf-target target:65000:1 
set routing-instances vpls protocols vpls site-range 3 
set routing-instances vpls protocols vpls no-tunnel-services 
set routing-instances vpls protocols vpls site 2 site-identifier 2 
set routing-instances vpls protocols vpls site 2 interface ge-2/0/4.0 
set routing-instances vpls protocols vpls vpls-id 100
set routing-instances vpls protocols vpls bum-hashing

Step-by-Step Procedure

To configure Device PE1:

Configure Device PE1 interfaces.

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[edit interfaces]
user@PE1# set ge-0/0/6 gigether-options 802.3ad ae0 
user@PE1# set ge-0/1/6 gigether-options 802.3ad ae0 
user@PE1# set ge-0/2/2 encapsulation ethernet-vpls 
user@PE1# set ge-0/2/2 unit 0 family vpls 
user@PE1# set ge-0/2/3 gigether-options 802.3ad ae0 
user@PE1# set ge-0/2/6 gigether-options 802.3ad ae0 
user@PE1# set ge-0/3/0 gigether-options 802.3ad ae0 
user@PE1# set ge-0/3/1 gigether-options 802.3ad ae0 
user@PE1# set ge-0/3/6 gigether-options 802.3ad ae0 
user@PE1# set ge-1/0/6 gigether-options 802.3ad ae0 
user@PE1# set ge-1/2/6 unit 0 family inet address 10.1.1.2/30 
user@PE1# set ae0 unit 0 family inet address 10.11.11.1/30 
user@PE1# set ae0 unit 0 family iso 
user@PE1# set ae0 unit 0 family mpls 

On Device PE1, configure the packet header data to be used for per-flow load balancing.

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[edit forwarding-options hash-key family multiservice]
user@PE1# set source-mac 
user@PE1# set destination-mac 
user@PE1# set payload ip layer-3 

Configure the routing policy on Device PE1.

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[edit policy-options]
user@PE1# set policy-statement exp-to-fwd term a from community grn-com 
user@PE1# set policy-statement exp-to-fwd term a then install-nexthop lsp PE1-to-PE2 
user@PE1# set policy-statement exp-to-fwd term a then accept 
user@PE1# set policy-options community grn-com members target:65000:1 

Configure Device PE1 routing protocols and MPLS.

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[edit protocols]
user@PE1# set rsvp interface all 
user@PE1# set rsvp interface fxp0.0 disable 
user@PE1# set mpls label-switched-path PE1-to-PE2 to 10.255.19.77 
user@PE1# set mpls label-switched-path PE1-to-PE3 to 10.255.19.79 
user@PE1# set mpls interface all
user@PE1# set mpls interface fxp0.0 disable 
user@PE1# set bgp group int type internal 
user@PE1# set bgp group int local-address 10.255.71.214 
user@PE1# set bgp group int family inet any 
user@PE1# set bgp group int family l2vpn signaling 
user@PE1# set bgp group int neighbor 10.255.19.77 
user@PE1# set bgp group int neighbor 10.255.19.79 
user@PE1# set ospf traffic-engineering 
user@PE1# set ospf area 0.0.0.0 interface all 
user@PE1# set ospf area 0.0.0.0 interface fxp0.0 disable 

Configure VPLS on Device PE1.

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[edit routing-instances vpls]
user@PE1# set instance-type vpls 
user@PE1# set interface ge-0/2/2.0 
user@PE1# set route-distinguisher 65000:1 
user@PE1# set vrf-target target:65000:1 
user@PE1# set protocols vpls site-range 3 
user@PE1# set protocols vpls no-tunnel-services 
user@PE1# set protocols vpls site asia site-identifier 1 
user@PE1# set protocols vpls site asia interface ge-0/2/2.0 
user@PE1# set protocols vpls vpls-id 100
user@PE1# set protocols vpls bum-hashing

Step-by-Step Procedure

To configure Device PE2:

Configure Device PE2 interfaces.

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[edit interfaces]
user@PE2# set ge-0/0/7 gigether-options 802.3ad ae0 
user@PE2# set ge-0/1/7 gigether-options 802.3ad ae0 
user@PE2# set ge-0/2/3 gigether-options 802.3ad ae0 
user@PE2# set ge-0/2/7 gigether-options 802.3ad ae0 
user@PE2# set ge-2/0/0 gigether-options 802.3ad ae1 
user@PE2# set ge-2/0/1 gigether-options 802.3ad ae1 
user@PE2# set ge-2/0/2 gigether-options 802.3ad ae1 
user@PE2# set ge-2/0/4 encapsulation ethernet-vpls 
user@PE2# set ge-2/0/4 unit 0 family vpls 
user@PE2# set ge-2/0/7 gigether-options 802.3ad ae0 
user@PE2# set ge-2/0/9 unit 0 family inet address 10.10.1.1/30 
user@PE2# set ge-2/0/9 unit 0 family mpls 
user@PE2# set ge-2/1/7 gigether-options 802.3ad ae0 
user@PE2# set ge-2/2/7 gigether-options 802.3ad ae0 
user@PE2# set ge-2/3/7 gigether-options 802.3ad ae0 
user@PE2# set ae0 unit 0 family inet address 10.11.11.2/30 
user@PE2# set ae0 unit 0 family iso 
user@PE2# set ae0 unit 0 family mpls 
user@PE2# set ae1 unit 0 family inet address 10.1.1.1/30 
user@PE2# set ae1 unit 0 family mpls 

Configure Device PE2 routing protocols and MPLS.

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[edit protocols]
user@PE2# set rsvp interface all 
user@PE2# set rsvp interface fxp0.0 disable 
user@PE2# set mpls label-switched-path PE2-to-PE3 from 10.255.19.77 
user@PE2# set mpls label-switched-path PE2-to-PE3 to 10.255.19.79 
user@PE2# set mpls label-switched-path PE2-to-PE1 to 10.255.71.214 
user@PE2# set mpls interface all 
user@PE2# set mpls interface fxp0.0 disable 
user@PE2# set bgp group int type internal 
user@PE2# set bgp group int local-address 10.255.19.77 
user@PE2# set bgp group int family inet any 
user@PE2# set bgp group int family l2vpn signaling 
user@PE2# set bgp group int neighbor 10.255.71.214 
user@PE2# set bgp group int neighbor 10.255.19.79 
user@PE2# set ospf traffic-engineering 
user@PE2# set ospf area 0.0.0.0 interface lo0.0 
user@PE2# set ospf area 0.0.0.0 interface ge-2/0/0.0 
user@PE2# set ospf area 0.0.0.0 interface ge-2/0/1.0 
user@PE2# set ospf area 0.0.0.0 interface ge-2/0/2.0 
user@PE2# set ospf area 0.0.0.0 interface ae0.0 
user@PE2# set ospf area 0.0.0.0 interface ae1.0 
user@PE2# set ospf area 0.0.0.0 interface all 
user@PE2# set ospf area 0.0.0.0 interface fxp0.0 disable 
user@PE2# set ldp interface all 
user@PE2# set ldp interface fxp0.0 disable 

Configure VPLS on Device PE2.

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[edit routing-instances vpls]
user@PE2# set instance-type vpls 
user@PE2# set interface ge-2/0/4.0 
user@PE2# set route-distinguisher 65000:1 
user@PE2# set vrf-target target:65000:1 
user@PE2# set protocols vpls site-range 3 
user@PE2# set protocols vpls no-tunnel-services 
user@PE2# set protocols vpls site 2 site-identifier 2 
user@PE2# set protocols vpls site 2 interface ge-2/0/4.0 
user@PE2# set protocols vpls vpls-id 100
user@PE2# set protocols vpls bum-hashing

Results

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

Device PE1

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user@PE1# show forwarding-options
hash-key {
    family multiservice {
        source-mac;
        destination-mac;
        payload {
            ip {
                layer-3;
            }
        }
    }
}

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user@PE1# show interfaces
ge-0/0/6 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/1/6 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/2/2 {
    encapsulation ethernet-vpls;
    unit 0 {
        family vpls;
    }
}
ge-0/2/3 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/2/6 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/3/0 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/3/1 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/3/6 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-1/0/6 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-1/2/6 {
    unit 0 {
        family inet {
            address 10.1.1.2/30;
        }
    }
}
ae0 {
    unit 0 {
        family inet {
            address 10.11.11.1/30;
        }
        family iso;
        family mpls;
    }
}

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user@PE1# show protocols
mpls {
    interface all;
    interface fxp0.0 {
        disable;
    }
    label-switched-path PE1-to-PE2 {
        to 10.255.19.77;
    }
    label-switched-path PE1-to-PE3 {
        to 10.255.19.79;
    }
}
rsvp {
    interface all;
    interface fxp0.0 {
        disable;
    }
}
bgp {
    group int {
        type internal;
        local-address 10.255.71.214;
        family inet {
            any;
        }
        family l2vpn {
            signaling;
        }
        neighbor 10.255.19.77;
        neighbor 10.255.19.79;
    }
}
ospf {
    traffic-engineering;
    area 0.0.0.0 {
        interface all;
        interface fxp0.0 {
            disable;
        }
    }
}

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user@PE1# show policy-options
policy-statement exp-to-fwd {
    term a {
        from community grn-com;
        then {
            install-nexthop lsp PE1-to-PE2;
            accept;
        }
    }
}
community grn-com members target:65000:1;

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user@PE1# show routing-instances
vpls {
    instance-type vpls;
    interface ge-0/2/2.0;
    route-distinguisher 65000:1;
    vrf-target target:65000:1;
    protocols {
        vpls {
            site-range 3;
            no-tunnel-services;
            site asia {
                site-identifier 1;
                interface ge-0/2/2.0;
            }
            vpls-id 100;
            bum-hashing;
        }
    }
}

Device PE2

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user@PE2# show interfaces
ge-0/0/7 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/1/7 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/2/3 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-0/2/7 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-2/0/0 {
    gigether-options {
        802.3ad ae1;
    }
}
ge-2/0/1 {
    gigether-options {
        802.3ad ae1;
    }
}
ge-2/0/2 {
    gigether-options {
        802.3ad ae1;
    }
}
ge-2/0/4 {
    encapsulation ethernet-vpls;
    unit 0 {
        family vpls;
    }
}
ge-2/0/7 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-2/0/9 {
    unit 0 {
        family inet {
            address 10.10.1.1/30;
        }
        family mpls;
    }
}
ge-2/1/7 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-2/2/7 {
    gigether-options {
        802.3ad ae0;
    }
}
ge-2/3/7 {
    gigether-options {
        802.3ad ae0;
    }
}
ae0 {
    unit 0 {
        family inet {
            address 10.11.11.2/30;
        }
        family iso;
        family mpls;
    }
}
ae1 {
    unit 0 {
        family inet {
            address 10.1.1.1/30;
        }
        family mpls;
    }
}

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user@PE2# show protocols
rsvp {
    interface all;
    interface fxp0.0 {
        disable;
    }
}
mpls {
    label-switched-path PE2-to-PE3 {
        from 10.255.19.77;
        to 10.255.19.79;
    }
    label-switched-path PE2-to-PE1 {
        to 10.255.71.214;
    }
    interface all;
    interface fxp0.0 {
        disable;
    }
}
bgp {
    group int {
        type internal;
        local-address 10.255.19.77;
        family inet {
            any;
        }
        family l2vpn {
            signaling;
        }
        neighbor 10.255.71.214;
        neighbor 10.255.19.79;
    }
}
ospf {
    traffic-engineering;
    area 0.0.0.0 {
        interface lo0.0;
        interface ge-2/0/0.0;
        interface ge-2/0/1.0;
        interface ge-2/0/2.0;
        interface ae0.0;
        interface ae1.0;
        interface all;
        interface fxp0.0 {
            disable;
        }
    }
}
ldp {
    interface all;
    interface fxp0.0 {
        disable;
    }
}

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user@PE2# show routing-instances
vpls {
    instance-type vpls;
    interface ge-2/0/4.0;
    route-distinguisher 65000:1;
    vrf-target target:65000:1;
    protocols {
        vpls {
            site-range 3;
            no-tunnel-services;
            site 2 {
                site-identifier 2;
                interface ge-2/0/4.0;
            }
            vpls-id 100;
            bum-hashing;
        }
    }
}

Verification

You can monitor the operation of the routing instance by running the show interfaces ae1.0 extensive and monitor interface traffic commands.

For troubleshooting, you can configure tracing operations for all of the protocols.

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Example: Configuring Multicast Load Balancing over Aggregated Ethernet Links

Requirements

Overview

Topology

Configuration

Procedure

CLI Quick Configuration

Step-by-Step Procedure

Step-by-Step Procedure

Results

Verification

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Traffic Sampling, Forwarding, and Monitoring User Guide

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Example: Configuring Multicast Load Balancing over Aggregated Ethernet Links

Requirements

Overview

Topology

Configuration

Procedure

CLI Quick Configuration

Step-by-Step Procedure

Step-by-Step Procedure

Results

Verification

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