04-01-2007 11:52 PM - edited 03-05-2019 03:14 PM
Hi all
I have the following very basic setup
Router 1 - 2800_lab
interface GigabitEthernet0/1
ip address 10.5.1.1 255.255.255.0
ip pim dense-mode
duplex full
speed 100
end
Router 2 - 2600_rtr2
interface FastEthernet0/1
ip address 10.5.1.2 255.255.255.0
ip pim dense-mode
speed auto
full-duplex
no cdp enable
no mop enabled
end
Both routers have "ip multicast-routing" enabled.
Both routers connect to a 3560 switch on their gi0/0 and fa0/1 interfaces respectively.
The 3560 switch has IGMP snooping turned on.
I also have a solaris server connected to the same switch - 10.5.1.12.
I ran a network sniffer on the solaris server and i am still seeing EIGRP updates coming through to the server
10.5.1.1 -> 224.0.0.10 IP D=224.0.0.10 S=10.5.1.1 LEN=60, ID=0, TOS=0xc0, TTL=2
10.5.1.2 -> 224.0.0.10 IP D=224.0.0.10 S=10.5.1.2 LEN=60, ID=0, TOS=0xc0, TTL=2
10.5.1.1 -> 224.0.0.10 IP D=224.0.0.10 S=10.5.1.1 LEN=60, ID=0, TOS=0xc0, TTL=2
10.5.1.2 -> 224.0.0.10 IP D=224.0.0.10 S=10.5.1.2 LEN=60, ID=0, TOS=0xc0, TTL=2
1) Why am i still seeing EIGRP multicast packets on the solaris server ?
2) Why do the following outputs make no mention of EIGRP 224.0.0.10
2800_lab#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 224.0.1.40), 2d21h/00:02:56, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
GigabitEthernet0/1, Forward/Dense, 2d21h/00:00:00
(*, 239.255.255.254), 2d21h/00:02:54, RP 0.0.0.0, flags: DC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
GigabitEthernet0/1, Forward/Dense, 2d21h/00:00:00
2800_lab#
2600_rtr2#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 239.255.255.254), 2d21h/00:02:04, RP 0.0.0.0, flags: DC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Dense, 2d21h/00:00:00
(*, 224.0.1.40), 2d21h/00:02:59, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Dense, 2d21h/00:00:00
2600_rtr2#
Switch output
======================================================================
lab_sw1#sh ip igmp snooping groups
Vlan Group Type Version Port List
-------------------------------------------------------------
50 224.0.1.40 igmp v2 Fa0/1, Fa0/15
50 239.255.255.254igmp v2 Fa0/1, Fa0/4, Fa0/15
lab_sw1#sh ip igmp snooping mrouter
Vlan ports
---- -----
50 Fa0/1(dynamic), Fa0/15(dynamic)
lab_sw1#
Any insights much appreciated
Jon
Solved! Go to Solution.
04-02-2007 12:53 AM
Hi Jon,
IGMP and CGMP does not work for reserved multicast addresses and as EIGRP used 224.0.0.10 which is one of the address from reserved multicast address range IGMP will not work it and will be flooded on ethernet segment.
Even if you try to add these addresses via a static ip igmp snooping entry it will report as message as illegal multicast address.
HTH
Ankur
04-02-2007 12:53 AM
Hi Jon,
IGMP and CGMP does not work for reserved multicast addresses and as EIGRP used 224.0.0.10 which is one of the address from reserved multicast address range IGMP will not work it and will be flooded on ethernet segment.
Even if you try to add these addresses via a static ip igmp snooping entry it will report as message as illegal multicast address.
HTH
Ankur
04-02-2007 01:15 AM
Hi Ankur
Many thanks for the reply and it does tie up with what i am seeing in my lab.
Jon
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