mtrace
ExtremeWare 7.5 Command Reference Guide
2001
mtrace
mtrace source <ip address> {destination <ip address>} {group <ip address>}
{from <ip address>} {gateway <ip address >} {timeout <seconds>}
{maximum-hops <number>}
Description
Initiates a request to trace the path of multicast traffic from the source to the destination of a multicast
group.
Syntax Description
Defaults
•
destination—current system
•
group—0.0.0.0
•
from—outgoing interface to reach the source or destination
•
gateway—destination 224.0.0.2
•
timeout—three seconds
•
maximum-hops—255
Usage Guidelines
This command relies on a feature of multicast routers that is accessed using the IGMP protocol. Since
multicast uses reverse path forwarding, a multicast trace is run from the destination to the source. A
query packet is sent to the last-hop multicast router. This router builds a trace response packet, fills in a
report for its hop, and forwards the packet to the next upstream router. As the request is forwarded,
each router in turn adds its own report to the trace response. When the request reaches the first-hop
router, the filled in request is sent back to the system requesting the trace. The request will also be
returned if the maximum hop limit is reached.
If a router does not support the mtrace functionality, it will silently drop the request packet and no
information will be returned. For this situation, you would send the trace with a small number of
maximum hops allowed, increasing the number of hops as the stream is traced.
<ip address>
Specifies an IP address.
source
Specifies the unicast address of the multicast source.
destination
Specifies the unicast address of the destination to which the path of the
multicast traffic will be traced.
group
Specifies the multicast IP address of the group for which the traffic will be
traced.
from
Specifies the unicast address of an interface in the system to use as the
response address in the request.
gateway
Specifies the unicast address of a first hop router to which the query will be
directed.
timeout
Specifies the time to wait before indicating a failure.
maximum-hops
Specifies the maximum number of hops the mtrace request can traverse.
Summary of Contents for ExtremeWare 7.5
Page 402: ...402 ExtremeWare 7 5 Command Reference Guide VLAN Commands ...
Page 470: ...470 ExtremeWare 7 5 Command Reference Guide QoS Commands ...
Page 490: ...490 ExtremeWare 7 5 Command Reference Guide NAT Commands ...
Page 826: ...826 ExtremeWare 7 5 Command Reference Guide Commands for Status Monitoring and Statistics ...
Page 1090: ...1090 ExtremeWare 7 5 Command Reference Guide Security Commands ...
Page 1386: ...1386 ExtremeWare 7 5 Command Reference Guide Wireless Commands ...
Page 1436: ...1436 ExtremeWare 7 5 Command Reference Guide EAPS Commands ...
Page 1568: ...1568 ExtremeWare 7 5 Command Reference Guide ESRP Commands ...
Page 1844: ...1844 ExtremeWare 7 5 Command Reference Guide IGP Commands ...
Page 1930: ...1930 ExtremeWare 7 5 Command Reference Guide BGP Commands i Series Switches Only ...
Page 2022: ...2022 ExtremeWare 7 5 Command Reference Guide IP Multicast Commands ...
Page 2066: ...2066 ExtremeWare 7 5 Command Reference Guide IPX Commands i Series Platforms Only ...
Page 2082: ...2082 ExtremeWare 7 5 Command Reference Guide ARM Commands BlackDiamond Switch Only ...
Page 2094: ...2094 ExtremeWare 7 5 Command Reference Guide Remote Connect Commands ...
Page 2174: ...2174 ExtremeWare 7 5 Command Reference Guide PoS Commands BlackDiamond Switch Only ...
Page 2372: ...2372 ExtremeWare 7 5 Command Reference Guide LLDP Commands ...
Page 2422: ...2422 ExtremeWare 7 5 Command Reference Guide H VPLS Commands BlackDiamond Switch Only ...
Page 2528: ...2528 ExtremeWare 7 5 Command Reference Guide MPLS Commands BlackDiamond Switch Only ...
