Multipoint Label Distribution Protocol Route Policy Map - Cisco ASR 9000 Series Configuration Manual

Implementing Layer-3 Multicast Routing on Cisco IOS XR Software
!
router pim
address-family ipv4
auto-rp mapping-agent TenGigE0/0/2/0 scope 11 interval 60
auto-rp candidate-rp TenGigE0/0/2/0 scope 10 group-list 224-4 interval 60
nsf lifetime 180
!
vrf vpn101
address-family ipv4
rpf topology route-policy p2mp
hello-interval 1
mdt c-multicast-routing bgp
!
bsr candidate-bsr 101.3.100.1 hash-mask-len 32 priority 1
bsr candidate-rp 101.3.100.1 priority 192 interval 60
!
address-family ipv6
rpf topology route-policy p2mp
hello-interval 3600
mdt c-multicast-routing pim
!
!
!
!

Multipoint Label Distribution Protocol Route Policy Map

Multicast supports Multipoint Label Distribution Protocol Route Policy Map, wherein Multipoint Label
Distribution Protocol uses the route policy maps to filter Label Mappings and selectively apply the configuration
features on Cisco IOS-XR operating system.
Route policy map for configuration commands:
The route policy map for the configuration commands provide you the flexibility to selectively enable some
of the mLDP features such as Make Before Break (MBB), Multicast only FRR (MoFRR) features, and so on,
on the applicable LSPs. Features like Make Before Break (MBB), Multicast only FRR (MoFRR), etc. can be
enabled on mLDP on IOS-XR operating system. When each of these features are enabled, they are enabled
for all of the mLDP Labeled-Switched Paths (LSPs) irrespective of whether they are applicable for the particular
LSP or not. For example, MoFRR is used for IPTV over mLDP in-band signaled P2MP LSPs, but not for the
generic MVPN using a MP2MP LSPs. Using the route policy map, you can configure mLDP to to selectively
enable some of the features.
Route policy for label mapping filtering:
The route policy map for the Label Mapping filtering provides a way to prevent the mLDP from crossing over
from one plane to another in the event of a failure.
Generally, the LSPs based on mLDP are built on unicast routing principle, and the LSPs follow unicast routing
as well. However, some networks are built on the concept of dual-plane design, where an mLDP LSP is created
in each of the planes to provide redundancy. In the event of a failure, mLDP crosses over to another plane.
To prevent mLDP from crossing over, mLDP Label Mappings are filtered either in an inbound or outbound
direction.
mLDP uses the existing RPL policy infrastructure in IOS-XR. With the existing RPL policy, mLDP FECs
are created and compared with the real mLDP FEC for filtering and configuration commands. (To create
mLDP FECs for filtering, create a new RPL policy (specific for mLDP FECs) with the necessary show and
configuration commands.) An mLDP FEC consists of 3 tuples: a tree type, root node address, and the opaque
encoding, which uniquely identifies the mLDP LSP. An opaque encoding has a different TLV encoding
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 6.0.x
Multipoint Label Distribution Protocol Route Policy Map
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