Huawei Quidway S3900 series Command Manual page 496

Command Manual – Multicast Protocol
Quidway S3900 Series Ethernet Switches-Release 1510
Description
Use the msdp-tracert command to trace the path along which an SA message travels,
so as to locate message loss and minimize configuration errors. After determining the
path of the SA message, you can prevent SA flooding through correct configuration.
By default, the number of skipped hops before the switch collects the detailed
information is 0.
Example
# Trace path information of (10.10.1.1, 225.2.2.2, 20.20.20.20).
<Quidway> msdp-tracert 10.10.1.1 225.2.2.2 20.20.20.20
# Specify the maximum number of hops to be traced and collect the detailed SA and
MSDP peer information.
<Quidway> msdp-tracert 10.10.1.1 225.2.2.2 20.20.20.20 max-hops 10 sa-info
peer-info
MSDP tracert: press CTRL_C to break
D-bit:
RP-bit: set if this router is an RP
NC-bit: set if this router is not caching SA's
C-bit:
MSDP trace route path information:
Router Address:
Fixed-length response info:
Peer Uptime: 10 minutes,
D-bit: 0,
Return Code: Reached-max-hops
Next Hop info:
Next-Hop Router Address: 0.0.0.0
SA info:
Count of SA messages received for this (S,G,RP): 0
Count of encapsulated data packets received for this (S,G,RP):0
SA cache entry uptime: 00:30:00 , SA cache entry expiry time: 00:03:32
Peering info:
Peering Uptime: 10 minutes,
Table 7-4 Description on the fields of the msdp-tracert command
Router Address
Peer Uptime
set if have this (S,G) in cache but with a different RP
set if this (S,G,RP) tuple is in the cache
20.20.1.1
RP-bit: 1,
Field
The address used by the local router to establish an
peering session with the Peer-PRF neighbor
The time of the peering session between the local router
and a Peer-RPF neighbor, in minutes. The maximum value
is 255.
Huawei Technologies Proprietary
Chapter 7 MSDP Configuration Commands
Cache Entry Uptime: 30 minutes
NC-bit: 0, C-bit: 1
Count of Peering Resets: 3
Description
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