Juniper BGP, Configuration Manual

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Use the show ip bgp vpnv4 vrf vrfName summary or show bgp ipv6 vpnv6
vrf vrfName summary command to verify your ECMP configuration. The output
includes a line indicating the equal-cost paths:
Maximum number of both EBGP and IBGP equal-cost paths is 16
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Use the no version to restore the default value, 1.
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See maximum-paths.
Enabling VPN Address Exchange
To limit the exchange of routes to those from within the VPN-IPv4 address family,
and to set other desired BGP parameters:
1.
Specify that the router exchanges addresses within a VPN by choosing the
VPN-IPv4 address family.
2.
Specify individual neighbors or peer groups to exchange routes with from only
within the current (VPN-IPv4) address family.
3.
Configure BGP parameters for VPN services.
See “Configuring BGP Routing” on page 3, for information about configuring
BGP sessions. The section “Understanding BGP Command Scope” on page 18
has tables that list BGP commands according to their scope. From Address Family
Configuration mode, you can issue the commands in Table 7 on page 19 and
Table 9 on page 20.
4.
Exit Address Family Configuration mode.
address-family
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Use to configure the router to exchange IPv4 addresses in VPN mode.
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The default setting is to exchange IPv4 addresses in unicast mode from the
default router.
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This command takes effect immediately.
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Example
host1:vr1(config-router)# address-family vpnv4
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Use the no version to disable the exchange of a type of prefix.
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See address-family.
exit-address-family
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Use to exit Address Family Configuration mode and access Router Configuration
mode.
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Example
host1:vr1(config-router-af)# exit-address-family
Configuring BGP VPN Services
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Chapter 5: Configuring BGP-MPLS Applications