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Example: Configuring Multicast Load Balancing over Aggregated Ethernet Links
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.
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.
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.
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.
Figure 1 shows the topology for this example. The example includes the configuration for Devices PE1 and PE2.
Configuration
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
[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 13.1.1.2/30
set interfaces ae0 unit 0 family inet address 11.11.11.1/30
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
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 1.1.1.1/30
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 11.11.11.2/30
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.
[edit interfaces]user@PE1# set ge-0/0/6 gigether-options 802.3ad ae0user@PE1# set ge-0/1/6 gigether-options 802.3ad ae0user@PE1# set ge-0/2/2 encapsulation ethernet-vplsuser@PE1# set ge-0/2/2 unit 0 family vplsuser@PE1# set ge-0/2/3 gigether-options 802.3ad ae0user@PE1# set ge-0/2/6 gigether-options 802.3ad ae0user@PE1# set ge-0/3/0 gigether-options 802.3ad ae0user@PE1# set ge-0/3/1 gigether-options 802.3ad ae0user@PE1# set ge-0/3/6 gigether-options 802.3ad ae0user@PE1# set ge-1/0/6 gigether-options 802.3ad ae0user@PE1# set ge-1/2/6 unit 0 family inet address 13.1.1.2/30user@PE1# set ae0 unit 0 family inet address 11.11.11.1/30user@PE1# set ae0 unit 0 family isouser@PE1# set ae0 unit 0 family mplsOn Device PE1, configure the packet header data to be used for per-flow load balancing.
[edit forwarding-options hash-key family multiservice]user@PE1# set source-macuser@PE1# set destination-macuser@PE1# set payload ip layer-3Configure the routing policy on Device PE1.
[edit policy-options]user@PE1# set policy-statement exp-to-fwd term a from community grn-comuser@PE1# set policy-statement exp-to-fwd term a then install-nexthop lsp PE1-to-PE2user@PE1# set policy-statement exp-to-fwd term a then acceptuser@PE1# set policy-options community grn-com members target:65000:1Configure Device PE1 routing protocols and MPLS.
[edit protocols]user@PE1# set rsvp interface alluser@PE1# set rsvp interface fxp0.0 disableuser@PE1# set mpls label-switched-path PE1-to-PE2 to 10.255.19.77user@PE1# set mpls label-switched-path PE1-to-PE3 to 10.255.19.79user@PE1# set mpls interface alluser@PE1# set mpls interface fxp0.0 disableuser@PE1# set bgp group int type internaluser@PE1# set bgp group int local-address 10.255.71.214user@PE1# set bgp group int family inet anyuser@PE1# set bgp group int family l2vpn signalinguser@PE1# set bgp group int neighbor 10.255.19.77user@PE1# set bgp group int neighbor 10.255.19.79user@PE1# set ospf traffic-engineeringuser@PE1# set ospf area 0.0.0.0 interface alluser@PE1# set ospf area 0.0.0.0 interface fxp0.0 disableConfigure VPLS on Device PE1.
[edit routing-instances vpls]user@PE1# set instance-type vplsuser@PE1# set interface ge-0/2/2.0user@PE1# set route-distinguisher 65000:1user@PE1# set vrf-target target:65000:1user@PE1# set protocols vpls site-range 3user@PE1# set protocols vpls no-tunnel-servicesuser@PE1# set protocols vpls site asia site-identifier 1user@PE1# set protocols vpls site asia interface ge-0/2/2.0user@PE1# set protocols vpls vpls-id 100user@PE1# set protocols vpls bum-hashing
Step-by-Step Procedure
To configure Device PE2:
Configure Device PE2 interfaces.
[edit interfaces]user@PE2# set ge-0/0/7 gigether-options 802.3ad ae0user@PE2# set ge-0/1/7 gigether-options 802.3ad ae0user@PE2# set ge-0/2/3 gigether-options 802.3ad ae0user@PE2# set ge-0/2/7 gigether-options 802.3ad ae0user@PE2# set ge-2/0/0 gigether-options 802.3ad ae1user@PE2# set ge-2/0/1 gigether-options 802.3ad ae1user@PE2# set ge-2/0/2 gigether-options 802.3ad ae1user@PE2# set ge-2/0/4 encapsulation ethernet-vplsuser@PE2# set ge-2/0/4 unit 0 family vplsuser@PE2# set ge-2/0/7 gigether-options 802.3ad ae0user@PE2# set ge-2/0/9 unit 0 family inet address 1.1.1.1/30user@PE2# set ge-2/0/9 unit 0 family mplsuser@PE2# set ge-2/1/7 gigether-options 802.3ad ae0user@PE2# set ge-2/2/7 gigether-options 802.3ad ae0user@PE2# set ge-2/3/7 gigether-options 802.3ad ae0user@PE2# set ae0 unit 0 family inet address 11.11.11.2/30user@PE2# set ae0 unit 0 family isouser@PE2# set ae0 unit 0 family mplsuser@PE2# set ae1 unit 0 family inet address 10.1.1.1/30user@PE2# set ae1 unit 0 family mplsConfigure Device PE2 routing protocols and MPLS.
[edit protocols]user@PE2# set rsvp interface alluser@PE2# set rsvp interface fxp0.0 disableuser@PE2# set mpls label-switched-path PE2-to-PE3 from 10.255.19.77user@PE2# set mpls label-switched-path PE2-to-PE3 to 10.255.19.79user@PE2# set mpls label-switched-path PE2-to-PE1 to 10.255.71.214user@PE2# set mpls interface alluser@PE2# set mpls interface fxp0.0 disableuser@PE2# set bgp group int type internaluser@PE2# set bgp group int local-address 10.255.19.77user@PE2# set bgp group int family inet anyuser@PE2# set bgp group int family l2vpn signalinguser@PE2# set bgp group int neighbor 10.255.71.214user@PE2# set bgp group int neighbor 10.255.19.79user@PE2# set ospf traffic-engineeringuser@PE2# set ospf area 0.0.0.0 interface lo0.0user@PE2# set ospf area 0.0.0.0 interface ge-2/0/0.0user@PE2# set ospf area 0.0.0.0 interface ge-2/0/1.0user@PE2# set ospf area 0.0.0.0 interface ge-2/0/2.0user@PE2# set ospf area 0.0.0.0 interface ae0.0user@PE2# set ospf area 0.0.0.0 interface ae1.0user@PE2# set ospf area 0.0.0.0 interface alluser@PE2# set ospf area 0.0.0.0 interface fxp0.0 disableuser@PE2# set ldp interface alluser@PE2# set ldp interface fxp0.0 disableConfigure VPLS on Device PE2.
[edit routing-instances vpls]user@PE2# set instance-type vplsuser@PE2# set interface ge-2/0/4.0user@PE2# set route-distinguisher 65000:1user@PE2# set vrf-target target:65000:1user@PE2# set protocols vpls site-range 3user@PE2# set protocols vpls no-tunnel-servicesuser@PE2# set protocols vpls site 2 site-identifier 2user@PE2# set protocols vpls site 2 interface ge-2/0/4.0user@PE2# set protocols vpls vpls-id 100user@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
user@PE1# show forwarding-options
hash-key {
family multiservice {
source-mac;
destination-mac;
payload {
ip {
layer-3;
}
}
}
}
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 13.1.1.2/30;
}
}
}
ae0 {
unit 0 {
family inet {
address 11.11.11.1/30;
}
family iso;
family mpls;
}
}
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;
}
}
}
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;
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
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 1.1.1.1/30;
}
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 11.11.11.2/30;
}
family iso;
family mpls;
}
}
ae1 {
unit 0 {
family inet {
address 10.1.1.1/30;
}
family mpls;
}
}
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;
}
}
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.