[cisco-voip] vg224 vs vg248

Tue Apr 11 09:29:03 EDT 2006

What kind of issues were you having that they couldn't fix?  That's not
comforting to hear.

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Matt Slaga (US)
Sent: Tuesday, April 11, 2006 9:24 AM
To: Lelio Fulgenzi; Ed Leatherman
Cc: Madziarczyk, Jonathan; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] vg224 vs vg248

Just a few months ago I had tac working feverishly on several usability
issues with the vg224s.  Their fix:  They replaced the vg224s with
vg248s.

Redundancy is not fully capable on any of the models as they all have a
single power supply.  If you are that worried about redundancy, get the
CMM with FXS modules.

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: Tuesday, April 11, 2006 9:02 AM
To: Ed Leatherman
Cc: Madziarczyk, Jonathan; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] vg224 vs vg248

Interesting, I just got a note back from my SE with what I'm sure was
'cut and pasted' advantages to the vg224 and it had redundancy in there.
It will be interesting to see what you find out.

	----- Original Message ----- 

	From: Ed Leatherman <mailto:ealeatherman at gmail.com>  

	To: Lelio Fulgenzi <mailto:lelio at uoguelph.ca>  

	Cc: Madziarczyk, Jonathan <mailto:JMad at cityofevanston.org>  ;
cisco-voip at puck.nether.net 

	Sent: Tuesday, April 11, 2006 8:26 AM

	Subject: Re: [cisco-voip] vg224 vs vg248

	Ok, here is what I have found so far from my SE about the
vg224/SCCP/redundant Link scenario...

	This is undocumented on CCO at the moment (unless it's hidden
real good)
	If you bind SCCP to the L0 interface, you can use the MAC
address for f0/0 in callmanager to set up the ports and it works fine.
you can shut down f0/0 or unplug it and it will keep working from the
f0/1 interface. I dont have any additional details yet but that sounds
promising.. I'm trying to get an official nod that this setup would be
TAC supported. 

	On 4/10/06, Lelio Fulgenzi <lelio at uoguelph.ca> wrote: 

	Excellent comments, thanks. I, for one, appreciate the time and
effort people on this list put in to helping each other out.

	Lelio

------------------------------------------------------------------------
--------
	Lelio Fulgenzi, B.A.
	Network Analyst (CCS) * University of Guelph * Guelph, Ontario
N1G 2W1
	(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
	Sanity First : Number of days with fewer than
	50 messages in my inbox at the end of the day:   buffer overrun

	----- Original Message ----- 

	From: Madziarczyk, Jonathan <mailto:JMad at cityofevanston.org>  

	To: cisco-voip at puck.nether.net 

	Sent: Monday, April 10, 2006 1:47 PM

	Subject: Re: [cisco-voip] vg224 vs vg248

	For the Loopback address, let me explain some of my statement.
You can enter a Loopback address.  We use EIGRP at our site.  VG224 does
not support EIGRP, it does seem to support RIP and OSPF.  RIP could cost
you a subnet to have a loopback (not sure if v2 is supported).  I didn't
feel like redistributing EIGRP into OSPF just for one device (if you
have multiple vg224s in one location that may make more sense for you).
The other option is to set multiple static routes on the VG224 and your
default gateways to get that loopback address into your routing tables.

	My philosophy is:  These are phones, there is a much higher
expectation of uptime and low-latency.  Do I want to support fancy and
complicated or do I want to support stable and simple?

	As for the SCCP/MGCP:

	That is correct, SCCP does provide more features than MGCP.
However, if you're trying to use the redundancy of two Ethernet
interfaces you can't in SCCP because it wants a MAC address, you can
only enter one address in CCM.

	If you're attaching analog devices, what particular features
that SCCP provides did you want?  Would you be doing blind transfers
with a fax machine or credit card machine?  If analog phones, will the
phones even support the features you want to use?

	In SCCP world, the configuration is split between the VG224 and
the CCM.  You have to configure the CCM and in the VG224 configure each
analog port as well.  In MGCP you enter 3-5 basic commands in the VG224
to point it to your CCM and from there all the configurations for the
ports are done on the CCM.  If you're familiar with the IOS commands,
that may be a non-issue, but if anything doesn't work, or you need to
make changes, you now have essentially two separate configurations to
administer for every line.

	So if the features in SCCP override the advantages of redundancy
and simplicity, then it sounds like SCCP is the way to go.

	I think I'm up to $.04 now, or maybe a half-shilling.

	JM

________________________________

	From: Lelio Fulgenzi [mailto:lelio at uoguelph.ca] 
	Sent: Monday, April 10, 2006 11:55 AM
	To: Madziarczyk, Jonathan; Ed Leatherman
	Cc: cisco-voip at puck.nether.net
	Subject: Re: [cisco-voip] vg224 vs vg248

	why would one use MGCP over SCCP? the chart seems to show that
SCCP has more features.

------------------------------------------------------------------------
--------
	Lelio Fulgenzi, B.A.
	Network Analyst (CCS) * University of Guelph * Guelph, Ontario
N1G 2W1
	(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
	Sanity First : Number of days with fewer than
	50 messages in my inbox at the end of the day:   buffer overrun

		----- Original Message ----- 

		From: Madziarczyk, Jonathan
<mailto:JMad at cityofevanston.org>  

		To: Lelio Fulgenzi <mailto:lelio at uoguelph.ca>  ; Ed
Leatherman <mailto:ealeatherman at gmail.com>  

		Cc: cisco-voip at puck.nether.net 

		Sent: Monday, April 10, 2006 12:50 PM

		Subject: RE: [cisco-voip] vg224 vs vg248

		I use a VG224.  I have currently not been able to find a
way to make the two Ethernet Interfaces work as redundant interfaces as
far as CCM is concerned.  If you're using SCCP to CCM you have to
specify the MAC address so that doesn't work.  If you're using MGCP, you
enter the IP address of the device.  Using a loopback address will not
work.  It looks like you might be able to use HSRP, but I've never tried
it.

		Someone here can speak to the redundant interface issue
I'm sure, but just know that even though it says it's running IOS, it's
not as robust.  Just because it has two Ethernet interfaces, it doesn't
mean you can use them the way you may be wanting to.  Otherwise it's a
pretty nice box and is simple as all getout to configure in MGCP.

		My $.02

		JM

________________________________

		From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
		Sent: Monday, April 10, 2006 10:58 AM
		To: Ed Leatherman
		Cc: cisco-voip at puck.nether.net
		Subject: Re: [cisco-voip] vg224 vs vg248

		I like the idea of redundant links. 

------------------------------------------------------------------------
--------
		Lelio Fulgenzi, B.A.
		Network Analyst (CCS) * University of Guelph * Guelph,
Ontario N1G 2W1
		(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
		Sanity First : Number of days with fewer than
		50 messages in my inbox at the end of the day:   buffer
overrun

			----- Original Message ----- 

			From: Ed Leatherman
<mailto:ealeatherman at gmail.com>  

			To: Lelio Fulgenzi <mailto:lelio at uoguelph.ca>  

			Cc: cisco-voip at puck.nether.net 

			Sent: Monday, April 10, 2006 11:54 AM

			Subject: Re: [cisco-voip] vg224 vs vg248

			I have some vg224's on order for a project this
summer, the reason we chose them instead of the 248's was we had a
requirement that the devices all needed dual ethernet interfaces (is for
a dorm on remote campus). 248's would have been less expensive due to
the port density but we couldnt get around the dual interface
requirement. Haven't recieved them yet so I can't comment on anything
else about the 224's. 

			We've been using the 248's in our health
sciences center, haven't really had any problems with them. I'd prefer
IOS on them but thats my only real complaint. No one has tried to hook
up a high speed fax yet though, I heard those werent supported unless
you turn them down. 

			On 4/10/06, Lelio Fulgenzi < lelio at uoguelph.ca
<mailto:lelio at uoguelph.ca> > wrote: 

			Just wondering what people's opinions are on the
two analog gateways (vg248 vs vg224). I'm proposing a project that
requires 128 ports (perhaps more) and we only have experience (mostly
good) with the vg248. I'd rather keep our inventory similar so I'm
leaning towards them rather than starting a new with vg224s. 

			Also, in the configuration guide, there is an
option for IPSEC software. Do I need this?

------------------------------------------------------------------------
--------
			Lelio Fulgenzi, B.A.
			Network Analyst (CCS) * University of Guelph *
Guelph, Ontario N1G 2W1
			(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
			Sanity First : Number of days with fewer than
			50 messages in my inbox at the end of the day:
buffer overrun

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			-- 
			Ed Leatherman
			IP Telephony Coordinator
			West Virginia University
			Telecommunications and Network Operations 

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	-- 
	Ed Leatherman
	IP Telephony Coordinator
	West Virginia University
	Telecommunications and Network Operations 

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