tracert vpls multicast

Function

The trace vpls multicast command starts an MFIB Trace test with a specified VSI in the VPLS domain.

Format

Parameters

Parameter	Description	Value
vsi vsi-name	Specifies the name of the VSI on which the operation is performed.	The value is an existing VSI.
-a source-ip-address	Specifies the IP address of the multicast source. By default, the multicast source IP address is the IP address of the initiator. The value is in dotted decimal notation.	-
-t timeout	Specifies the timeout period for waiting for an Echo Reply packet.	The value ranges from 0 to 65535, in milliseconds. The default value is 2000 milliseconds.
-r reply-mode	Specifies the reply mode. The default value is 2. 1: indicates that the peer end does not respond to Echo Request packets. 2: indicates that the peer end responds to Echo Request packets with IPv4 or IPv6 UDP packets. 3: indicates that the peer end responds to Echo Request packets with IPv4 or IPv6 UDP packets carrying the Router Alert option. 4: indicates that the peer end responds to Echo Request packets through the control channel of the application program grade. 5: indicates that the peer end responds to Echo Request packets with VPLS IPv4 UDP packets. NOTE: Currently, the switch only supports mode 1, 2, and 5.	-
-exp exp	Specifies the priority of Echo Request packets to be sent.	The value is an integer that ranges from 0 to 7. The default value is 0.
-f first-ttl	Specifies the initial TTL.	The value ranges from 1 to 255.
-m max-ttl	Specifies the maximum TTL, which is not smaller than the initial TTL.	The value ranges from 1 to 255.
multicast-address multicast-ip-address	Adds a PW to the multicast group with the specified IP address.	-
remote-address remote-ip-address	Specifies a unicast IP address.	-

Views

All views

Default Level

0: Visit level

Usage Guidelines

Usage Scenario

You can run the tracert vpls multicast command on the PE, SPE, and UPE to implement the monitoring functions:

The command is used to locate the faulty PE on the VPLS network when IGMP Snooping is enabled.
The command is used for path discovery on the VPLS network when the IGMP Snooping is disabled.

Precautions

The trace vpls multicast command does not support BGP AD VPLS.

Example

# Initiate a Trace test in a specified VSI with the multicast address being 226.0.0.1 in the VPLS domain.

<HUAWEI> tracert vpls multicast vsi a2 multicast-address 226.0.0.1 remote
-address 10.3.3.9
traceroute to 10.3.3.9 vsi a2, 30 hops max , press CTRL+C to break
------------------------------------------------------------------
TTL  0
 Num     : 1            Replier: UNKNOWN         Upstream: UNKNOWN
 Time    : 0            Snpg   : N               Version : 2
 Proxy   : N            Port   : N               FW Mode : IP
 Hit Flag: NotInMFIB    PW Info: Y               Alert   : N
 Policy  : Permit       CAC    : N
 Query   : 0            Report : 0               Leave   : 0
------------------------------------------------------------------
TTL  1
 Num     : 1            Replier: 10.3.3.9         Upstream: 10.1.1.9
 Time    : 7            Snpg   : N               Version : 2
 Proxy   : N            Port   : N               FW Mode : IP
 Hit Flag: NotInMFIB    PW Info: N               Alert   : N
 Policy  : Permit       CAC    : N
 Query   : 0            Report : 0               Leave   : 0
------------------------------------------------------------------
Info: Succeed in tracing the destination address  10.3.3.9

**Table 1** Description of the tracert vpls multicast command output
Item	Description
TTL	Time to live.
Num	Sequence number of the received packet.
Replier	Address of the replier.
Upstream	Address of the PE that sends or forwards the packet.
Time	Time the packet is processed. That is, period from the time the Request packet is sent from the source node to the time a Reply packet is received by the source node.
Snpg	Whether IGMP Snooping is enabled.
Version	Version of IGMP Snooping enabled in the VSI.
Proxy	Whether IGMP Snooping proxy is enabled.
Port	Whether the interface learning function is enabled.
FW Mode	MAC address-based forwarding mode or IP address-based forwarding mode.
Hit Flag	Whether corresponding multicast forwarding information exists in the MFIB.
PW Info	Whether the PWs forwarding the packet can be obtained according to the ingoing label.
Alert	State in which the interface only receives IGMP messages with Router-Alert options.
Policy	Whether the packet meets the deny rule or permit rule according to the ACL.
CAC	Whether connection admission control is configured in the VSI.
Query	The number of Query packets using the current IGMP version received by the replier.
Report	The number of Report packets using the current IGMP version received by the replier.
Leave	The number of Leave packets using the current IGMP version received by the replier.