Cisco ASR 9000 Series Routing Configuration Guide

The following example shows how to configure the route policy retainer and apply it to the retain route target
attach point. The route is accepted if the route contains route target extended communities 10:615, 10:6150,
and 15.15.15.15.15:15. All other non-matching routes are dropped.
extcommunity-set rt rtset1
0:615,
10:6150,
15.15.15.15.15:15
end-set
route-policy retainer
if extcommunity rt matches-any rtset1 then
pass
endif
end-policy
router bgp 2
address-family vpnv4 unicast
retain route-target route-policy retainer
.
.
.
Label-Mode
The label-mode attachpoint provides facility to choose label mode based on arbitrary match criteria such as
prefix value, community. This attach point is typically used to set the type of label mode to per-ce or per-vrf
or per-prefix based on deployment preferences. The attribute setting actions supported are for pass and drop.
This example shows label mode selection at VPNv4 AF (address family) level and at VRF IPv4 AF level:
route-policy set_label_mode
set label-mode per-prefix
end-policy
!
router bgp 100
address-family vpnv4 unicast
vrf all
label mode route-policy pass-all
!
!
vrf abc
rd 1:1
address-family ipv4 unicast
label mode route-policy set_label_mode
!
!
!
end
Neighbor-ORF
The neighbor-orf attach point provides the filtering of incoming BGP route updates using only prefix-based
matching. In addition to using this as an inbound filter, the prefixes and disposition (drop or pass) are sent to
upstream neighbors as an Outbound Route Filter (ORF) to allow them to perform filtering.
The following example shows how to configure a route policy orf-preset and apply it to the neighbor ORF
attach point. The prefix of the route is dropped if it matches any prefix specified in orf-preset (172.16.1.0/24,
172.16.5.0/24, 172.16.11.0/24). In addition to this inbound filtering, BGP also sends these prefix entries to
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
575
Implementing Routing Policy
Attach Points

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model