Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 650)

626 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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Configuring BGP VPNs on a PE
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The rt route ID variable specifies the route target that is applied to filtering. The route ID has the
format of either ASN:nn or IP-address:nn. When four-byte ASNs have been enabled or when
four-byte IP addresses are used, the user-purposed nn value can be a maximum of two bytes
instead of our bytes.
The soo route ID variable specifies the site of origin. The route ID has the format of either ASN:nn or
IP-address:nn. When four-byte ASNs have been enabled or when four-byte IP addresses are used,
the user-purposed nn value can be a maximum of two bytes instead of our bytes.
Creating a VPNv4 route reflector
PE devices in a BGP or MPLS VPN share routes between each other using IBGP. This can be
accomplished using a full mesh configuration or a route reflector can be used to simplify a
networks topology and improve scalability. While the general concepts are the same for using
Route Reflectors in a normal IBGP network as in an BGP or MPLS VPN, there are some differences.
In addition, there are special conditions that apply when a route reflector is configured for normal
IPv4 BGP traffic (IPv4) and for BGP or MPLS VPN traffic (VPNv4). The differences and special
considerations are described in the following:
Special considerations when configuring a route reflector for both IPv4 and VPNv4:
• A VPNv4 route does not need to be installed in any VRF before being reflected.
• Route reflector configurations for IPv4 and VPNv4 are separated in different address family
configurations.
• For a VPNv4 route installed to a VRF, the reflected VPNv4 route still carries the original RD and
PA.
• When there is a route reflector configuration change, a warning message is displayed that
requests the user to clear the neighbor session.
Specific commands for VPNv4 – There are VPNv4 specific commands that must be configured to
configure a route reflector for a BGP or MPLS VPN under address family VPNv4. A route reflector
can be configured on a PE for IPv4 and VPNv4 or for either exclusively. When the user is configuring
a route reflector for a BGP or MPLS VPN, the user must configure it specifically using the VPNv4
specific commands.
To create a VPNv4 route reflector with a client at the IP address 10.11.11.2, enter the following
commands at the VPNv4 level of BGP Config level.
Brocade(config-bgp-vpnv4u)# neighbor 10.11.11.2 route-reflector-client
Syntax: [no] neighbor IPaddress route-reflector-client
The IPaddress variable is the IP address of the PE device that the user wants to define the route
reflector client.
A route reflector can be setup with local import filtering to filter out VPNv4 routes matched by an
extended community list. This requires that the user creates an extended community list for the
routes the user wants to filter and set the following command.
Brocade(config-bgp)# address-family vpnv4 unicast
Brocade(config-bgp-vpnv4u)# rr-group 1
Syntax: [no] rr-group group-num