Simple Multicast LAN

[steven.t27]

Hi All

Equipment: WS-C3750X-24T-S

IOS: c3750e-universalk9-mz.152-1.E.bin

I am trying to setup iptv on a simple network but I am having issues with.

Have attached my config!

My server is connected to port 9 and a stb connected to port 10.

My stb interface is getting flooded.

Switch#sh int gi1/0/10

GigabitEthernet1/0/10 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is b0fa.eb76.9a16 (bia b0fa.eb76.9a16)

  MTU 1500 bytes, BW 1000000 Kbit/sec, 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

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input never, output 00:00:00, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 4000 bits/sec, 3 packets/sec

  5 minute output rate 8694000 bits/sec, 201 packets/sec <--- port getting flooded?

     3248 packets input, 361556 bytes, 0 no buffer

     Received 776 broadcasts (307 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 307 multicast, 0 pause input

     0 input packets with dribble condition detected

     177511 packets output, 239538048 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

[daniel.dib]

Why do you say that it is getting flooded? How much multicast are you sending? The port is currently outputing 8.7 Mbit/s of traffic.

Daniel Dib
CCIE #37149

[steven.t27]

Well, I have the same config on another lab environment and it's work fine. The iptv administrator has advise that multicast is not configured properly. What are the steps that can I can use to verify? 8.7Mb? I thought I was 87Mb instead. Can you explain the RP address command? This is just a flat network without extended switches. Do I still need this?

[Lei Tian · Accepted solution]

Hi,

If the IPTV and STB are directly connected to port 9 and 10, you dont need to configure anything. Both ports are in same VLAN, multicast should work. To verify, configure a SPAN port to monitor port 9, make sure IPTV is sending mcast packets, and configure SPAN port to monitor port 10, make sure STB is receiving mcast packets.

HTH,

Lei Tian

[steven.t27]

Thanks for the tip! Will try this tshoot method next time.

[daniel.dib · Accepted solution]

I agree with Lei. For a simple topology like this there should be no need for any more configuration.

Daniel Dib
CCIE #37149