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IGMP snooping on NM-16ESW

 
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doka.ua



Joined: 07 Oct 2010
Posts: 4
Location: Kyiv, Ukraine

PostPosted: Thu Dec 02, 2010 8:58 am    Post subject: IGMP snooping on NM-16ESW Reply with quote

ipmask wrote:
Thanks for the comment Justin!
I used c3660-ik9o3s-mz.124-13b.image and I can get the snooping option now!!


Guys, whether IGMP snooping really works? It seems, no. I'm trying to get working the following topo:

Code:

(Windows host) - SA0(3725/NM-16ESW) - A0(7200)
                   \----------------- C0(7200)


so A0 & C0 running PIM and form DR/BDR pair, while SA0 should do IGMP snooping from Windows host machine.

When I send IGMP query from Windows host (using Ostinato traffic generator), both A0 & C0 see this IGMP query as well as IGMP queries from each other. Despite the fact that on SA0:

- all ports are switchports in VLAN 1
- IGMP snooping enabled in VLAN1

SA0 see nothing (IGMP queries from host as well as between routers) and, thus, fill nothing in it's tables, particularly mrouter table:

Code:

interface FastEthernet1/0
 spanning-tree portfast
!
interface FastEthernet1/1
 spanning-tree portfast
!
interface FastEthernet1/2
 spanning-tree portfast


SA0#sh ip igmp snooping vlan 1
vlan 1
----------
 IGMP snooping is globally enabled
 IGMP snooping is enabled on this Vlan
 IGMP snooping immediate-leave is disabled on this Vlan
 IGMP snooping mrouter learn mode is pim-dvmrp on this Vlan
 IGMP snooping is running in IGMP_ONLY mode on this Vlan

SA0#sh ip igmp snooping mrouter
Vlan    ports
----    -----

SA0#


From my point of view, this is natural behavior, because NM-16ESW supports multicast in hardware and dynamips can't emulate hardware stuff.

May be someone can comment this a bit more?

Thank you.
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doka.ua



Joined: 07 Oct 2010
Posts: 4
Location: Kyiv, Ukraine

PostPosted: Thu Dec 02, 2010 9:10 am    Post subject: Re: IGMP snooping on NM-16ESW Reply with quote

doka.ua wrote:

Guys, whether IGMP snooping really works? It seems, no. I'm trying to get working the following topo:


Have forgotten to say about IOS version on NM-16ESW host:

Code:

SA0#sh ver
Cisco IOS Software, 3700 Software (C3725-ADVENTERPRISEK9-M), Version 12.4(25b), RELEASE SOFTWARE (fc1)
[ ... ]
Cisco 3725 (R7000) processor (revision 0.1) with 124928K/6144K bytes of memory.
Processor board ID XXXXXXXXXXX
R7000 CPU at 240MHz, Implementation 39, Rev 2.1, 256KB L2, 512KB L3 Cache
18 FastEthernet interfaces
DRAM configuration is 64 bits wide with parity enabled.
55K bytes of NVRAM.
16384K bytes of ATA System CompactFlash (Read/Write)

Configuration register is 0x2102


Thank you.
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mathew791



Joined: 09 Apr 2011
Posts: 215

PostPosted: Thu May 12, 2011 3:39 am    Post subject: Reply with quote

When I send IGMP query from Windows host (using Ostinato traffic generator), both A0 & C0 see this IGMP query as well as IGMP queries from each other.
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doka.ua



Joined: 07 Oct 2010
Posts: 4
Location: Kyiv, Ukraine

PostPosted: Thu May 12, 2011 6:55 pm    Post subject: Reply with quote

mathew791 wrote:
When I send IGMP query from Windows host (using Ostinato traffic generator), both A0 & C0 see this IGMP query as well as IGMP queries from each other.


Well, the problem is that SA0 don't do IGMP snooping.
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WatsonZion



Joined: 02 Dec 2016
Posts: 2

PostPosted: Fri Dec 02, 2016 7:41 am    Post subject: Reply with quote

From my perspective, this is common conduct, since NM-16ESW backings multicast in equipment and dynamips can't copy equipment stuff. So A0 and C0 running PIM and Biology Research Paper shape DR/BDR combine, while SA0 ought to do IGMP snooping from Windows have machine.
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