show pgm negative-acknowledgments
Syntax
Release Information
Command introduced before Junos OS Release 7.4.
Description
Display the sent or received Pragmatic General Multicast (PGM) negative acknowledgments (NAKs), the source-path message (SPM) sequence number being negatively acknowledged, and the current state of repair.
Options
This command has no options.
Required Privilege Level
view
List of Sample Output
show pgm negative-acknowledgmentsOutput Fields
Table 1 describes the output fields for the show pgm negative-acknowledgments command. Output fields are listed in the approximate order in which they appear.
Table 1: show pgm negative-acknowledgments Output Fields
Field Name | Field Description |
|---|---|
Global source id | Global source identifier (GSI), which combines with the source port to determine the transport session identifier (TSI). |
Network layer address | Network layer address of the local system. |
Source port | Source port number, which is combined with the GSI to determine the TSI. |
SPM sequence number | Numeric sequence identifier of the source-path message. |
Window (trailing/leading sequence) | Range of sequence numbers used by the source for sequentially numbering and transmitting the most recent packets. The trailing (or left) edge of the transmit window is the sequence number of the oldest data packet available for repair from a source. The leading (or right) edge of the transmit window is defined as the sequence number of the most recent data packet a source has transmitted. |
Outstanding NAKS | Total number of outstanding negative acknowledgments sent or received by the local system. NAK packets indicate that a packet in the expected original data sequence has been detected as missing.
|
Sample Output
show pgm negative-acknowledgments
user@host> show pgm negative-acknowledgments Global source ID: 010203040506 Source port: 1111
Network layer address: 10.38.0.1
SPM sequence number: 1
Window (trailing/leading sequence): 0/1
Outstanding NAKs:
Sequence number: 1
Group: 225.1.1.1
Source: 192.168.195.121
Interface: t3-0/2/0:0 Receiver: 10.38.0.10
