mtrace
ExtremeWare Software 7.3.0 Command Reference Guide
1539
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 7.3.0
Page 54: ...54 ExtremeWare Software 7 3 0 Command Reference Guide Contents...
Page 104: ...104 ExtremeWare Software 7 3 0 Command Reference Guide Commands for Accessing the Switch...
Page 378: ...378 ExtremeWare Software 7 3 0 Command Reference Guide FDB Commands...
Page 418: ...418 ExtremeWare Software 7 3 0 Command Reference Guide QoS Commands...
Page 436: ...436 ExtremeWare Software 7 3 0 Command Reference Guide NAT Commands...
Page 600: ...600 ExtremeWare Software 7 3 0 Command Reference Guide SLB Commands...
Page 968: ...968 ExtremeWare Software 7 3 0 Command Reference Guide Security Commands...
Page 1002: ...1002 ExtremeWare Software 7 3 0 Command Reference Guide EAPS Commands...
Page 1126: ...1126 ExtremeWare Software 7 3 0 Command Reference Guide ESRP Commands...
Page 1392: ...1392 ExtremeWare Software 7 3 0 Command Reference Guide IGP Commands...
Page 1478: ...1478 ExtremeWare Software 7 3 0 Command Reference Guide BGP Commands...
Page 1556: ...1556 ExtremeWare Software 7 3 0 Command Reference Guide IP Multicast Commands...
Page 1600: ...1600 ExtremeWare Software 7 3 0 Command Reference Guide IPX Commands...
Page 1616: ...1616 ExtremeWare Software 7 3 0 Command Reference Guide ARM Commands...
Page 1694: ...1694 ExtremeWare Software 7 3 0 Command Reference Guide PoS Commands...
Page 1750: ...1750 ExtremeWare Software 7 3 0 Command Reference Guide T1 E1 and T3 WAN Commands...
Page 1856: ...1856 ExtremeWare Software 7 3 0 Command Reference Guide MPLS Commands...
Page 1898: ...1898 ExtremeWare Software 7 3 0 Command Reference Guide High Density Gigabit Ethernet Commands...
Page 1938: ...1938 ExtremeWare Software 7 3 0 Command Reference Guide Power Over Ethernet Commands...
Page 1988: ...1988 ExtremeWare Software 7 3 0 Command Reference Guide H VPLS Commands...
Page 2106: ...2106 ExtremeWare Software 7 3 0 Command Reference Guide Wireless Commands...
Page 2132: ...2132 ExtremeWare Software 7 3 0 Command Reference Guide Configuration and Image Commands...
Page 2236: ...2236 ExtremeWare Software 7 3 0 Command Reference Guide Troubleshooting Commands...
Page 2254: ...2254 ExtremeWare Software 7 3 0 Command Reference Guide Index of Commands...