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Home > Archive > Voice over IP Cisco > July 2006 > Redundancy to the endpoint
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Redundancy to the endpoint
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| Mike Armstrong 2006-07-11, 1:11 pm |
| Cisco's campus model stops being redundant at the access layer switch, which
(according to cisco) should have high port density. When one of those
fails, devices connected to those dense ports go dark if they're only
connected to one switch. We had a 3750-PoE-48 go down last Friday, and 48
phones are now blank. cisco initially said they didn't have another one to
send us until July 21, but I persuaded them to send a 3560 as a temporary
replacement, so with a minor configuration change we should be back in
business later today. Nevertheless, losing 48 phones is still a big deal
for us, and even if we had the money to support a fully-redundant switch,
there's still a significant outage while the fault is detected and the patch
cables are swapped. I wonder what other folks do in anticipation of a
high-port-density switch failing, and if there's a likelihood of improved
redundancy at this level in the future?
Mike Armstrong
UF/IFAS CREC
Lake Alfred, FL
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| Voll, Scott 2006-07-11, 1:11 pm |
| Save your money on Smartnet and buy an extra or two switches ;-)
Smartnet has nailed me a time or two also. Try having a CMM blade as
your main VGW and them take 3 days to get you a new one......
Fortunately it was pre-production, but it still makes a guy VERY
nervous.
Scott
-----Original Message-----
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Mike Armstrong
Sent: Tuesday, July 11, 2006 8:09 AM
To: cisco-voip@puck.nether.net
Subject: [cisco-voip] Redundancy to the endpoint
Cisco's campus model stops being redundant at the access layer switch,
which
(according to cisco) should have high port density. When one of those
fails, devices connected to those dense ports go dark if they're only
connected to one switch. We had a 3750-PoE-48 go down last Friday, and
48
phones are now blank. cisco initially said they didn't have another one
to
send us until July 21, but I persuaded them to send a 3560 as a
temporary
replacement, so with a minor configuration change we should be back in
business later today. Nevertheless, losing 48 phones is still a big
deal
for us, and even if we had the money to support a fully-redundant
switch,
there's still a significant outage while the fault is detected and the
patch
cables are swapped. I wonder what other folks do in anticipation of a
high-port-density switch failing, and if there's a likelihood of
improved
redundancy at this level in the future?
Mike Armstrong
UF/IFAS CREC
Lake Alfred, FL
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cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Lelio Fulgenzi 2006-07-11, 1:11 pm |
| I used to like those RJ21 connectors - made swapping out a blade very quick. Do they still have modules with that as an option? Could go with cat4k or 6k with those modules I guess.
--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * university of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
"I can eat fifty eggs." "Nobody can eat fifty eggs."
----- Original Message -----
From: Mike Armstrong
To: cisco-voip@puck.nether.net
Sent: Tuesday, July 11, 2006 11:08 AM
Subject: [cisco-voip] Redundancy to the endpoint
Cisco's campus model stops being redundant at the access layer switch, which
(according to cisco) should have high port density. When one of those
fails, devices connected to those dense ports go dark if they're only
connected to one switch. We had a 3750-PoE-48 go down last Friday, and 48
phones are now blank. cisco initially said they didn't have another one to
send us until July 21, but I persuaded them to send a 3560 as a temporary
replacement, so with a minor configuration change we should be back in
business later today. Nevertheless, losing 48 phones is still a big deal
for us, and even if we had the money to support a fully-redundant switch,
there's still a significant outage while the fault is detected and the patch
cables are swapped. I wonder what other folks do in anticipation of a
high-port-density switch failing, and if there's a likelihood of improved
redundancy at this level in the future?
Mike Armstrong
UF/IFAS CREC
Lake Alfred, FL
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Ed Leatherman 2006-07-11, 1:11 pm |
| Agree 100% with scott, we keep 1 or 2 spare switches and don't rely on
smartnet to get us a critical part. We dont buy smartnet on access switches
with warranties, we just replace with spares. I think we keep support for 1
of each type for support on configuration problems.
Had one of our 6903 chassis go bad on us (one with a 6608 T1 blade providing
PSTN access...). The one thing I didnt have a spare for. took about a week
to get a replacement even though we have NBD service on the box. At the time
we had plenty of capacity on our other gateway so we werent out of service..
but was very frustrating - I was just waiting for that other gateway to
break...
On 7/11/06, Mike Armstrong <mfa@crec.ifas.ufl.edu> wrote:
>
> Cisco's campus model stops being redundant at the access layer switch,
> which
> (according to cisco) should have high port density. When one of those
> fails, devices connected to those dense ports go dark if they're only
> connected to one switch. We had a 3750-PoE-48 go down last Friday, and 48
> phones are now blank. cisco initially said they didn't have another one
> to
> send us until July 21, but I persuaded them to send a 3560 as a temporary
> replacement, so with a minor configuration change we should be back in
> business later today. Nevertheless, losing 48 phones is still a big deal
> for us, and even if we had the money to support a fully-redundant switch,
> there's still a significant outage while the fault is detected and the
> patch
> cables are swapped. I wonder what other folks do in anticipation of a
> high-port-density switch failing, and if there's a likelihood of improved
> redundancy at this level in the future?
>
> Mike Armstrong
> UF/IFAS CREC
> Lake Alfred, FL
>
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
--
Ed Leatherman
IP Telephony Coordinator
West Virginia University
Telecommunications and Network Operations
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