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

Wed Jan 28 19:57:14 EST 2015

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
>>
>>
>>
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>
>