Re: [c-nsp] FabricPath & PIM-SM Interoperation

2013-09-20 Thread Tim Stevenson 

At 08:43 AM 9/17/2013  Tuesday, Yuri Bank noted:

Hi Tim,

Thanks for your response.

I should have phrased my question differently. I'm not suggesting 
that FP IS-IS actually interacts with PIM-SM directly.


My question is:  Will the FP device, which is running PIM-SM on some 
SVI, send PIM Register/Join messages for learned multicast 
sources/receivers in the FP domain?


Yes, absolutely.




Imagine the following scenario.

You have DeviceA and DeviceB.

DeviceA is a FP switch, with an entire FP domain behind it.
DeviceB is a legacy multilayer switch, or router, with many other L3 
devices behind it.


DeviceA has an FP-VLAN with a PIM-SM enabled SVI in it.
DeviceB simply has a layer3 interface (in the above vlan) with PIM-SM enabled.

Now the RP, sits somewhere behind DeviceB. Obviously, if there is a 
host somewhere in the FP network that starts sending multicast 
traffic, DeviceA will have to send out a PIM-Register message in 
order for the RP to learn of the source(otherwise, only hosts in the 
FP network would be able to listen to that traffic).



Yes, the FP switch with the SVI will attract the multicast traffic 
(learned as an mrouter) and once that traffic hits the SVI all the 
usual first hop router mechanisms for L3 multicast kick in.



Likewise, if there is a multicast receiver in FP network, a PIM-Join 
message would need to make its way to the RP.



IGMP snooping intercepts the join at the edge switch to track state 
on the edge port. That join will be flooded on the mrouter ports (and 
also handed over to FP ISIS to advertise the edge switch's interest 
in that group in FP via GM-LSPs.) Once the join hits the SVI all the 
usual last hop router mechansims kick in.


Tim



Does this make sense? Again, I greatly appreciate your response.

-Yuri Bank



On Tue, Sep 17, 2013 at 9:46 AM, Tim Stevenson 
<tstev...@cisco.com> wrote:

Hi Yuri, please see inline below:

At 03:27 AM 9/17/2013  Tuesday, Yuri Bank clamored:

Hello fellow networking enthusiasts,

I have a few specific questions concerning this:

1. *Will a N7k/N5k translate GM-LSPs into PIM-Join messages, on a boundary
link that has a remote peer running PIM-SM?



No. FP ISIS GM-LSPs are an L2 concept here, they basically track 
group membership state at L2 inside the FP core. FP ISIS would not 
"peer" with a router running PIM-SM; you would typically have an SVI 
enabled for the FP VLAN, and that would have PIM enabled to integrate to L3.




2. *Same question as it relates to sources learned, that are within the
FabricPath domain. Will PIM Register messages be generated, and sent to the
RP in the PIM-SM domain?



Not without an SVI/router interface running PIM connected into the FP domain.




3. *Any general information regarding this topic would be greatly
appreciated, as I could find very little documentation about this.



Think of FP GM-LSPs as an extension of IGMP snooping. All the L3 
integration is basically the same in FP and classical Ethernet.



Hope that helps,
Tim





Regards,

YuriB
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Tim Stevenson, tstev...@cisco.com
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Tim Stevenson, tstev...@cisco.com
Routing & Switching CCIE #5561
Distinguished Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759

The contents of this message may be *Cisco Confidential*
and are intended for the specified recipients only.
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Re: [c-nsp] FabricPath & PIM-SM Interoperation

2013-09-17 Thread Tim Stevenson 

Hi Yuri, please see inline below:

At 03:27 AM 9/17/2013  Tuesday, Yuri Bank clamored:

Hello fellow networking enthusiasts,

I have a few specific questions concerning this:

1. *Will a N7k/N5k translate GM-LSPs into PIM-Join messages, on a boundary
link that has a remote peer running PIM-SM?



No. FP ISIS GM-LSPs are an L2 concept here, they basically track 
group membership state at L2 inside the FP core. FP ISIS would not 
"peer" with a router running PIM-SM; you would typically have an SVI 
enabled for the FP VLAN, and that would have PIM enabled to integrate to L3.




2. *Same question as it relates to sources learned, that are within the
FabricPath domain. Will PIM Register messages be generated, and sent to the
RP in the PIM-SM domain?



Not without an SVI/router interface running PIM connected into the FP domain.




3. *Any general information regarding this topic would be greatly
appreciated, as I could find very little documentation about this.



Think of FP GM-LSPs as an extension of IGMP snooping. All the L3 
integration is basically the same in FP and classical Ethernet.



Hope that helps,
Tim





Regards,

YuriB
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Tim Stevenson, tstev...@cisco.com
Routing & Switching CCIE #5561
Distinguished Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759

The contents of this message may be *Cisco Confidential*
and are intended for the specified recipients only.

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Re: [c-nsp] FabricPath & PIM-SM Interoperation

2013-09-17 Thread Yuri Bank 
Hi Tim,

Thanks for your response.

I should have phrased my question differently. I'm not suggesting that FP
IS-IS actually interacts with PIM-SM directly.

My question is:  Will the FP device, which is running PIM-SM on some SVI,
send PIM Register/Join messages for learned multicast sources/receivers in
the FP domain?

Imagine the following scenario.

You have DeviceA and DeviceB.

DeviceA is a FP switch, with an entire FP domain behind it.
DeviceB is a legacy multilayer switch, or router, with many other L3
devices behind it.

DeviceA has an FP-VLAN with a PIM-SM enabled SVI in it.
DeviceB simply has a layer3 interface (in the above vlan) with PIM-SM
enabled.

Now the RP, sits somewhere behind DeviceB. Obviously, if there is a host
somewhere in the FP network that starts sending multicast traffic, DeviceA
will have to send out a PIM-Register message in order for the RP to learn
of the source(otherwise, only hosts in the FP network would be able to
listen to that traffic). Likewise, if there is a multicast receiver in FP
network, a PIM-Join message would need to make its way to the RP.

Does this make sense? Again, I greatly appreciate your response.

-Yuri Bank



On Tue, Sep 17, 2013 at 9:46 AM, Tim Stevenson  wrote:

> Hi Yuri, please see inline below:
>
> At 03:27 AM 9/17/2013  Tuesday, Yuri Bank clamored:
>
>  Hello fellow networking enthusiasts,
>>
>> I have a few specific questions concerning this:
>>
>> 1. *Will a N7k/N5k translate GM-LSPs into PIM-Join messages, on a boundary
>> link that has a remote peer running PIM-SM?
>>
>
>
> No. FP ISIS GM-LSPs are an L2 concept here, they basically track group
> membership state at L2 inside the FP core. FP ISIS would not "peer" with a
> router running PIM-SM; you would typically have an SVI enabled for the FP
> VLAN, and that would have PIM enabled to integrate to L3.
>
>
>
>  2. *Same question as it relates to sources learned, that are within the
>> FabricPath domain. Will PIM Register messages be generated, and sent to
>> the
>> RP in the PIM-SM domain?
>>
>
>
> Not without an SVI/router interface running PIM connected into the FP
> domain.
>
>
>
>
>  3. *Any general information regarding this topic would be greatly
>> appreciated, as I could find very little documentation about this.
>>
>
>
> Think of FP GM-LSPs as an extension of IGMP snooping. All the L3
> integration is basically the same in FP and classical Ethernet.
>
>
> Hope that helps,
> Tim
>
>
>
>
>
>  Regards,
>>
>> YuriB
>> __**_
>> cisco-nsp mailing list  cisco-nsp@puck.nether.net
>> https://puck.nether.net/**mailman/listinfo/cisco-nsp
>> archive at 
>> http://puck.nether.net/**pipermail/cisco-nsp/
>>
>
>
>
>
> Tim Stevenson, tstev...@cisco.com
> Routing & Switching CCIE #5561
> Distinguished Technical Marketing Engineer, Cisco Nexus 7000
> Cisco - http://www.cisco.com
> IP Phone: 408-526-6759
> **
> The contents of this message may be *Cisco Confidential*
> and are intended for the specified recipients only.
>
>
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Re: [c-nsp] FabricPath & PIM-SM Interoperation

2013-09-17 Thread Lars Christensen 
PIM-SM is layer 3, FabricPath is layer 2...

Regards
Lars

Sendt fra min iPhone

Den 17/09/2013 kl. 10.36 skrev Yuri Bank :

> Hello fellow networking enthusiasts,
>
> I have a few specific questions concerning this:
>
> 1. *Will a N7k/N5k translate GM-LSPs into PIM-Join messages, on a boundary
> link that has a remote peer running PIM-SM?
>
> 2. *Same question as it relates to sources learned, that are within the
> FabricPath domain. Will PIM Register messages be generated, and sent to the
> RP in the PIM-SM domain?
>
> 3. *Any general information regarding this topic would be greatly
> appreciated, as I could find very little documentation about this.
>
> Regards,
>
> YuriB
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[c-nsp] FabricPath & PIM-SM Interoperation

2013-09-17 Thread Yuri Bank 
Hello fellow networking enthusiasts,

I have a few specific questions concerning this:

1. *Will a N7k/N5k translate GM-LSPs into PIM-Join messages, on a boundary
link that has a remote peer running PIM-SM?

2. *Same question as it relates to sources learned, that are within the
FabricPath domain. Will PIM Register messages be generated, and sent to the
RP in the PIM-SM domain?

3. *Any general information regarding this topic would be greatly
appreciated, as I could find very little documentation about this.

Regards,

YuriB
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