[c-nsp] Enabling multicast routing on 3750G platform

Thu Jan 29 05:33:47 EST 2015

Try again after removing the IGMP join on the outside vlan.

Regards,

Antonio Soares, CCIE #18473 (RS/SP)
amsoares at netcabo.pt
http://www.ccie18473.net

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Lobo
Sent: quinta-feira, 29 de Janeiro de 2015 00:57
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Enabling multicast routing on 3750G platform

I've moved the configuration on the switch so that the ports are routed now
instead of using vlans but still no go.

Here is the output from a show ip mroute:

Switch#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
       V - RD & Vector, v - Vector
Outgoing interface flags: H - Hardware switched, A - Assert winner
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 239.255.255.250), 00:01:03/00:02:56, RP 3.3.3.3, flags: SJC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    GigabitEthernet1/0/2, Forward/Sparse, 00:01:03/00:02:06
    GigabitEthernet1/0/1, Forward/Sparse, 00:01:03/00:02:56

(*, 239.0.0.1), 00:01:22/00:02:56, RP 3.3.3.3, flags: SJCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    GigabitEthernet1/0/2, Forward/Sparse, 00:01:23/00:02:56

(*, 224.0.1.40), 00:01:23/00:02:08, RP 3.3.3.3, flags: SJCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:01:23/00:02:08

Switch#

Switch#sh ip pim interface

Address          Interface                Ver/   Nbr    Query  DR     DR
                                          Mode   Count  Intvl  Prior
3.3.3.3          Loopback0                v2/S   0      30     1
 3.3.3.3
1.1.1.2          GigabitEthernet1/0/1     v2/S   0      30     1
 1.1.1.2
2.2.2.2          GigabitEthernet1/0/2     v2/S   0      30     1
 2.2.2.2
Switch#

The traffic is still coming in on port 1:

Switch#sh int g1/0/1
GigabitEthernet1/0/1 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0018.73bf.12c1 (bia
0018.73bf.12c1)
  Internet address is 1.1.1.2/24
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 12/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX <snip>
  30 second input rate 4822000 bits/sec, 444 packets/sec
  30 second output rate 0 bits/sec, 0 packets/sec

but not exiting on port 2

Switch#sh int g1/0/2
GigabitEthernet1/0/2 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0018.73bf.12c2 (bia
0018.73bf.12c2)
  Internet address is 2.2.2.2/24
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX <snip>
  30 second input rate 4000 bits/sec, 6 packets/sec
  30 second output rate 1000 bits/sec, 1 packets/sec

I've changed the TTL on VLC to 10 and I've also changed things to
sparse-mode and put it on the loopback as well.

Any other suggestions?

!
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
 ip pim sparse-mode
!
interface GigabitEthernet1/0/1
 no switchport
 ip address 1.1.1.2 255.255.255.0
 ip pim sparse-mode
 load-interval 30
 spanning-tree portfast
!
interface GigabitEthernet1/0/2
 no switchport
 ip address 2.2.2.2 255.255.255.0
 ip pim sparse-mode
 ip igmp join-group 239.0.0.1
 load-interval 30
 spanning-tree portfast
!
ip routing
no ip domain-lookup
!
!
ip multicast-routing distributed
!
!
ip pim rp-address 3.3.3.3
!

Jose

On Wed, Jan 28, 2015 at 4:43 PM, Lobo <lobotiger at gmail.com> wrote:

> Thanks for the replies. I'll post a show mroute and tweak the VLC 
> parameters once I get access to the device tonight.  BTW, all of this 
> testing is just on a single switch so no other topology exists.
>
> Jose
>
> On Wed, Jan 28, 2015 at 12:55 PM, Adrian Minta 
> <adrian.minta at gmail.com>
> wrote:
>
>> Hi,
>> look for the stream TTL.
>>
>> On 28.01.2015 19:37, Lobo wrote:
>>
>>> Hi everyone.  I've been trying to get multicast routing to work on a 
>>> single 3750G switch between two vlans but for the life of me it just 
>>> doesn't work.  When the host and receiver are on a single vlan the 
>>> streaming works ....
>>> The server streaming via VLC is 1.1.1.1 and is using 239.0.0.1 for 
>>> the multicast address. The receiver is 2.2.2.1 and using VLC to 
>>> stream.  I can see the traffic coming in on port 1 but no traffic 
>>> leaving the switch's other port.
>>>
>>> BTW, I tried dense-mode and sparse-mode as well with similar results.
>>>
>>> Any thoughts?
>>>
>>> Jose
>>>
>>>
>> --
>> Best regards,
>> Adrian Minta
>>
>>
>>
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>
>
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