Re: igmp join and ping

Thanks.that is a new leaening for me

2010/8/22, Bob Sinclair <bob_at_bobsinclair.net>:
> Hello Mustafa,
>
> In my experience Cisco routers respond to pings using as a source address
> the IP address of the interface that the echo request arrived on. So I
> would expect the reply to come from an external interface, not a loopback
> address.
>
> HTH,
>
> Bob Sinclair CCIE 10427 CCSI 30427
> CIERS2 Online Instructor
> www.tinyurl.com/ciers2online
>
>> -----Original Message-----
>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>> Mustafa Yadav
>> Sent: Sunday, August 22, 2010 3:11 PM
>> To: Cisco certification
>> Subject: igmp join and ping
>>
>> hi
>>
>>
>> I have a question relevant to igmp.As shown bleow I configured vlan
>> 783 for
>> igmp group 228.28.28.28.And then from the source ping 228.28.28.28
>> .Instead
>> of vlna 783 ip address another interface f1/1 ip address has answered
>> that
>> ping.Do i know something wrong?As far as I know only igmp join
>> configred
>> interfaces have to asnwer that ping.
>>
>> RSRack1R6#ping 228.28.28.28
>>
>> Type escape sequence to abort.
>> Sending 1, 100-byte ICMP Echos to 228.28.28.28, timeout is 2 seconds:
>>
>> Reply to request 0 from 132.1.17.7, 740 ms
>>
>>
>>
>> RSRack1SW1# sh ip igmp groups
>> IGMP Connected Group Membership
>> Group Address Interface Uptime Expires Last
>> Reporter
>> 228.28.28.28 Vlan783 00:35:30 00:02:39
>> 204.12.1.7
>> 224.0.1.40 FastEthernet1/1 00:36:43 00:02:29
>> 132.1.17.7
>> RSRack1SW1#sh run int vl
>> RSRack1SW1#sh run int vlan 783
>> Building configuration...
>>
>> Current configuration : 115 bytes
>> !
>> interface Vlan783
>> ip address 204.12.1.7 255.255.255.0
>> ip pim sparse-mode
>> ip igmp join-group 228.28.28.28
>> end
>>
>> RSRack1SW1#sh run int f1/1
>> Building configuration...
>>
>> Current configuration : 105 bytes
>> !
>> interface FastEthernet1/1
>> no switchport
>> ip address 132.1.17.7 255.255.255.0
>> ip pim sparse-mode
>> end
>>
>> RSRack1SW1#
>>
>>
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