Mpls Oam Capabilities - H3C S9500 Series Operation Manual

Operation Manual – MPLS OAM
H3C S9500 Series Routing Switches
0
Function type (03Hex)
Figure 1-4 OAM BDI packet format

1.1.3 MPLS OAM Capabilities

I. Basic capability
MPLS OAM basic capability refers to connectivity verification.
Figure 1-5 Networking diagram for MPLS OAM connectivity verification
As shown in
1) The ingress node sends CV/FFD packets through the LSP to be verified to the
egress node.
2) By comparing the received information such as packet type, frequency and TTSI
with the locally recorded values that should be received, the egress node checks
the packets are received properly, and takes statistics for the right packets and
wrong packets received in the verification period so as to monitor the LSP
connectivity.
3) Once it detects LSP defects, the egress node analyzes the types of LSP defects
and transmits the BDI packet with defect information to the ingress node through a
reverse channel. In this way, the ingress node can get the defect state
7
Reserved (00Hex)
TTSI (optional, if not used set to all 00Hex)
Defect location (4 octets)
Padding (all 00Hex)
Ingress Ingress
LSR LSR
Figure 1-5, procedure of connectivity verification follows:
Chapter 1 MPLS OAM Configuration
15
Defect type
(20 octets)
(14 octets)
BIP16 (2 octets)
Egress Egress
LSR LSR
1-5
31