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Configuring a Manual mLDP P2MP Tunnel
Configuring a Manual mLDP P2MP Tunnel
A manual mLDP P2MP tunnel can be manually triggered and
transmit multicast services, excluding multicast VPN services.
Context
Manually configure the root and leaf nodes to trigger
the establishment of a manual mLDP P2MP tunnel.
Procedure
Enable mLDP P2MP globally
Run:
system-view
The system view is displayed.
Run:
mpls ldp
The MPLS-LDP view is
displayed.
Run:
mldp p2mp
mLDP P2MP is enabled globally.
(Optional) Run:
mldp make-before-break
The mLDP make-before-break (MBB) capability is
enabled.
If the optimal route between a non-root node and
a root node on an mLDP P2MP network changes, the non-root node re-selects
an upstream node and by default tears down the P2MP LSP.As a result,
traffic is dropped before a new P2MP LSP is established. To prevent
traffic loss, the make-before-break capability can be enabled on the
mLDP network. If the optimal route to the root node changes, the non-root
node establishes a new P2MP LSP before tearing down the original P2MP
LSP, which minimizes traffic loss.
Run:
commit
The configuration is committed.
(Optional) Disable mLDP P2MP on an interface
To flexibly control the path of a P2MP LSP, you can disable
mLDP P2MP on a specified interface.
Disabling mLDP P2MP on an
interface helps you plan a network. For example, if links balance
traffic on a network, to enable P2MP traffic to travel along a specific
link, disable mLDP P2MP on interfaces connected to other links.
Run:
system-view
The system view is displayed.
Run:
interfaceinterface-typeinterface-number
The interface view is displayed.
Run:
mpls mldp p2mp disable
mLDP P2MP is disabled on the interface.
Disabling mLDP P2MP on an interface causes P2MP
LSPs to fail to be established, while does not affect existing P2P
LDP sessions.
Run:
commit
The configuration is committed.
Configure each leaf node to trigger LSP establishment
After mLDP P2MP is enabled on all node, configure each leaf
node to trigger mLDP P2MP LSP establishment.
The root node address and LSP ID are specified on the leaf node
so that the leaf node can request the root node to establish an mLDP
P2MP LSP.
The root-ip-address and lsp-id parameters uniquely identify an mLDP P2MP LSP.
Run:
commit
The configuration is committed.
(Optional) Configure an mLDP P2MP tunnel interface
Before multicast traffic is directed to an mLDP P2MP LSP,
the mLDP P2MP LSP must be bound to an mLDP P2MP tunnel interface so
that the tunnel interface can be statically added to an Internet Group
Management Protocol (IGMP) multicast group.
Run:
system-view
The system view is displayed.
Run:
mldp-p2mp-tunneltunnel-name
An mLDP P2MP tunnel
interface is created.
Run:
root-iproot-ip-addresslsp-idlsp-id
An mLDP P2MP LSP is bound to
the tunnel interface.
Run:
commit
The configuration is committed.
Follow-up Procedure
Statically add the tunnel interface to an IGMP multicast
group before multicast traffic is directed to the mLDP P2MP LSP.