Enabling Sending Of Mpls Ttl-Expired Messages; Enabling Mpls Forwarding Statistics; Enabling Ftn Forwarding Statistics - HP HPE FlexNetwork MSR Router Series Configuration Manual

Step
2. Enable TTL
propagation.
Enabling sending of MPLS TTL-expired
messages
This feature enables an LSR to generate an ICMP TTL-expired message upon receiving an MPLS
packet with a TTL of 1. If the MPLS packet has only one label, the LSR sends the ICMP TTL-expired
message back to the source through IP routing. If the MPLS packet has multiple labels, the LSR
sends it along the LSP to the egress, which then sends the message back to the source.
To enable sending of MPLS TTL-expired messages:
Step
1. Enter system view.
2. Enable sending of MPLS
TTL-expired messages.

Enabling MPLS forwarding statistics

Enabling FTN forwarding statistics

FEC-to-NHLFE map (FTN) entries are FIB entries that contain outgoing labels used for FTN
forwarding. When an LSR receives an unlabeled packet, it searches for the corresponding FTN entry
based on the destination IP address. If a match is found, the LSR adds the outgoing label in the FTN
entry to the packet and forwards the labeled packet.
To enable FTN forwarding statistics:
Step
1. Enter system view.
2. Enter RIB view.
3. Create a RIB IPv4 address
family and enter RIB IPv4
address family view.
4. Enable the device to
maintain FTN entries in the
RIB.
5. Enable FTN forwarding
statistics for a destination
network.
Command
mpls ttl propagate { public |
vpn }
Command
system-view
mpls ttl expiration enable
Command
system-view
rib
address-family ipv4
ftn enable
mpls-forwarding statistics
prefix-list prefix-list-name
9
Remarks
By default, TTL propagation is enabled only
for public-network packets.
This command affects only the propagation
between IP TTL and label TTL. Within an
MPLS network, TTL is always copied
between the labels of an MPLS packet.
Remarks
N/A
By default, this function is
enabled.
Remarks
N/A
N/A
By default, no RIB IPv4
address family is created.
By default, the device does not
maintain FTN entries in the
RIB.
By default, FTN forwarding
statistics is disabled for all
destination networks.