[c-nsp] L3 Switch as a BGP Gateway

[Murphy, Jay, DOH]

Because of what in hardware? Switching fabric; ASICs. Memory is upgradeable. How about considering MTBF. Really, hardware has limitations anyway. Equipment is replete with all kinds of thresholds. Larger boxes are not exempt per se. It's really what one is willing to address. Filters, as the man said earlier; I mean, flexibility is applicable: partial routes, not the complete routing table, in some instances. It's how we frame it.

When a router/switch craps out, we replace it; no matter what model we've deployed. So some of this input holds weight, the rest are bones. No vendor creates the 'bullet-proof' appliance.

~Jay Murphy 
Sr. IP Network Specialist
NM State Government
 
IT Services Division
PSB – IP Network Management Center
Santa Fé, New México 87505 
"We move the information that moves your world." 
“Engineering is about finding the sweet spot between what's solvable and what isn't."
“Good engineering demands that we understand what we’re doing and why, keep an open mind, and learn from experience.”
                                                                                                                                                                            Radia Perlman
"If human beings are perceived as potentials rather than problems, as possessing strengths instead of weaknesses, as unlimited rather than dull and unresponsive, then they thrive and grow to their capabilities."
                                                                                                                                                                         
 Please consider the environment before printing e-mail


-----Original Message-----
From: Scott Granados [mailto:scott at granados-llc.net] 
Sent: Monday, June 27, 2011 2:45 PM
To: Murphy, Jay, DOH
Cc: Jay Hennigan; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] L3 Switch as a BGP Gateway

Route limitations are in hardware I believe.

On Jun 27, 2011, at 1:30 PM, Murphy, Jay, DOH wrote:

> How about when you stack them as a logical switch. Couldn't one leverage the memory and processing of the stacking?
> 
> ~Jay Murphy 
> Sr. IP Network Specialist
> NM State Government
> 
> IT Services Division
> PSB – IP Network Management Center
> Santa Fé, New México 87505 
> "We move the information that moves your world." 
> “Engineering is about finding the sweet spot between what's solvable and what isn't."
> “Good engineering demands that we understand what we’re doing and why, keep an open mind, and learn from experience.”
>                                                                                                                                                                            Radia Perlman
> "If human beings are perceived as potentials rather than problems, as possessing strengths instead of weaknesses, as unlimited rather than dull and unresponsive, then they thrive and grow to their capabilities."
> 
>  Please consider the environment before printing e-mail
> 
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jay Hennigan
> Sent: Monday, June 27, 2011 1:11 PM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] L3 Switch as a BGP Gateway
> 
> On 6/27/11 11:59 AM, Jason Greenberg wrote:
>> Can someone advise me as to why a 3750 L3 Switch (Metro Model) wouldn't outperform a 7300 series router as a multi-homed BGP gateway?  ISRs and Enterprise class routers are still quite a bit more expensive than the L3 Switches, but I'm starting to not understand why.   I understand that L3 switches are less feature rich on the routing end, but suppose that our ASAs are doing most of the complicated filtering.    I know it doesn't sound "right" to have a 3750G used in this manner, but I am having a hard time finding any real reason why not to do it.
> 
> The memory and number of routes are far too small to use these as a
> border router.  Generally adequate for iBGP to inject customer routes
> into your network but way too little for an Internet-facing border.
> 
> --
> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
> Impulse Internet Service  -  http://www.impulse.net/
> Your local telephone and internet company - 805 884-6323 - WB6RDV
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