pretty self explanatory. How the heck can I figure out what version of IGMP a router is implementing?

1/22/2007 2:29:30 PM

If it's a cisco router use "show ip igmp interface"

R1# show ip igmp interface
Ethernet1 is up, line protocol is up
  Internet address is 192.168.9.3/24
  IGMP is enabled on interface
  Current IGMP version is 2
  CGMP is disabled on interface
  IGMP query interval is 60 seconds
  IGMP querier timeout is 120 seconds
  IGMP max query response time is 10 seconds
  Last member query response interval is 1000 ms
  Inbound IGMP access group is not set
  IGMP activity: 22 joins, 18 leaves
  Multicast routing is enabled on interface
  Multicast TTL threshold is 0
  Multicast designated router (DR) is 192.168.9.5  
  IGMP querying router is 192.168.9.3 (this system)
  Multicast groups joined (number of users):
      224.0.1.40(1)

1/22/2007 3:12:21 PM

*whip*

^Back to the queue.

1/22/2007 5:08:08 PM

let's assume it's not a cisco router... how can I get to such a console for a consumer router?

1/22/2007 8:44:32 PM

through the power of imagination

1/22/2007 8:50:25 PM

what consumer router is even capable of routing multicast?

1/22/2007 10:11:26 PM

that's what i'm tryna figure out

1/22/2007 10:12:06 PM

as far as your console question, I've never seen a consumer router with a CLI, just a web interface.

And even then, the ones that do more than just NAT simply have support for RIP and not much else. it's more a firewall than a true router.

1/22/2007 10:22:20 PM

Quote :

"what consumer router is even capable of routing multicast"

linksys WRT54GL, (~$70) with third-party open source firmware.

1/24/2007 8:26:14 AM

link?

1/24/2007 9:05:32 AM

Linksys makes the WRT54G wireless router. the firmware has been open-source to comply with the GPL

so thirdparties have been making some awesome firmware for it. I like DD-WRT

http://www.dd-wrt.com/wiki/index.php/Main_Page

there are others

http://en.wikipedia.org/wiki/WRT54G

later versions of the "G" series have decreased flash memory and changed OS, thus making it more difficult to use third party firmware, and more chances you'll brick the router when trying to upgrade.

i suggest you spend about 10 more dollars on the "GL" version which has more flash and the OS is based on the linux kernel.

1/26/2007 12:42:58 AM

Quote :

"i suggest you spend about 10 more dollars on the "GL" version which has more flash and the OS is based on the linux kernel. "

100% correct in my book.


[Edited on January 26, 2007 at 2:00 AM. Reason : Man I <3 routers]

1/26/2007 1:55:56 AM

even if you do flash the WRT54 it's still a piece of shit that crashes every other hour

1/26/2007 8:34:48 AM

My L has been up for a couple of weeks now witth dd-wrt running on it.

1/26/2007 8:37:49 AM

^^^^

Still nothing about routing multicast. I googled the shit out of this, and can find no reference to the ability for a linksys router to route multicast. I seriously doubt that a linksys router has enough horsepower to run PIM, act as an RP, perform RPF checks on every multicast packet coming in, etc. The ASICs certainly don't support it, and the CPU and memory are not enough to handle it.

1/26/2007 9:30:00 AM

Agree with Bobby here. Not sure why you would want to do this anyway as the multicast would be limited to your internal network. There is not much value in multicast to MOST home users unless they are the proud administrator of a 100 node wireless network and need to use ghost to upgrade everything at the same time

1/26/2007 10:32:31 AM

oh, well.

guess i need to look up wtf multicast really means.


still, its a good wireless router.

1/26/2007 8:16:48 PM

The only multicast functionality that you'll traditionally need out of a C-PE router is IGMP proxy/snooping. An upstream multicast filter (for non IGMP traffic) is also a feature sometimes sought out by service providers.

1/27/2007 11:49:27 AM