[27588] in resnet
SOHO WiFi routers and residential networking
daemon@ATHENA.MIT.EDU (Crowe, Sheila)
Fri Apr 27 13:52:03 2012
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Message-ID: <D0A43E8CC19B144398DFEC438095CB180E39ACCF8E@EXCMS.msu.montana.edu>
Date: Fri, 27 Apr 2012 11:48:37 -0600
Reply-To: Resnet Forum <RESNET-L@listserv.nd.edu>
From: "Crowe, Sheila" <sheila@MONTANA.EDU>
To: RESNET-L@listserv.nd.edu
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In early March, I participated in a thread started by Jeannie Abney about w=
hat other schools' polices are for residents bringing personal wireless rou=
ters onto your network. I added some questions pertaining to single family=
apartments (vs. residence halls) and got some great feedback. I would lik=
e to take it a step further and ask some more questions based on the type o=
f network that we have.
We have a Cisco network, a core at the origin of the commodity internet pip=
e, and a subnet for each of our buildings (really areas). In the residence=
halls we have a large Aruba wireless network installed so that every build=
ing is blanketed for secure wireless internet access. In the residence ha=
lls, ResNet is charged out to every resident regardless of whether they use=
it or not.
We do not provide ubiquitous wireless coverage in family housing because Re=
sNet is an opt-in service. Additionally, our family housing area was wired =
about 13 years ago and only provided one wired jack per apartment. As I'm s=
ure you can imagine, virtually every customer in family housing has a soho =
wireless router. When we upgraded this section of our network (from 3Com s=
witches to Cisco), we immediately had a BIG problem with our network droppi=
ng constantly. It was ultimately decided that it was the SOHO wireless rou=
ters causing the problem; namely, unicast packet floods through our Cisco s=
witch ports. Only recently it was discovered that Cisco switches have a fea=
ture that will block unicast and multicast floods. We are deploying this s=
lowly.
Now for the questions. For those of you who have a similar network, do you =
employ this Cisco feature or do you simply block all "rogue" wireless conne=
ctions? Or do you have another measure in place to deal with the unicast p=
acket floods? Also, do your network engineers consider this a stopgap meas=
ure ("band-aid") to deal with residences where you do not offer WiFi?
Please do share all of the details about this issue (or non-issue) on your =
network as you know them. And thanks a million!
Sheila Crowe
Montana State University ResNet
406.994.4230
406.209.7243
P.S. I'm hoping to see all of you at the 2012 Student Technology Conference=
at Claremont Colleges!
___________________________________________________
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nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>In early March, =
I participated in a thread started by Jeannie Abney about what other school=
s’ polices are for residents bringing personal wireless routers onto =
your network. I added some questions pertaining to single family apar=
tments (vs. residence halls) and got some great feedback. I would lik=
e to take it a step further and ask some more questions based on the type o=
f network that we have.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p=
></p><p class=3DMsoNormal>We have a Cisco network, a core at the origin of =
the commodity internet pipe, and a subnet for each of our buildings (really=
areas). In the residence halls we have a large Aruba wireless networ=
k installed so that every building is blanketed for secure wireless interne=
t access. In the residence halls, ResNet is charged out to ever=
y resident regardless of whether they use it or not. <o:p></o:p></p><=
p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>We do not pro=
vide ubiquitous wireless coverage in family housing because ResNet is an op=
t-in service. Additionally, our family housing area was wired about 13 year=
s ago and only provided one wired jack per apartment. As I’m sure you=
can imagine, virtually every customer in family housing has a soho wireles=
s router. When we upgraded this section of our network (from 3Com swi=
tches to Cisco), we immediately had a BIG problem with our network dropping=
constantly. It was ultimately decided that it was the SOHO wireless =
routers causing the problem; namely, unicast packet floods through our Cisc=
o switch ports. Only recently it was discovered that Cisco switches have a =
feature that will block unicast and multicast floods. We are deployin=
g this slowly. <o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p><=
/p><p class=3DMsoNormal>Now for the questions. For those of you who have a =
similar network, do you employ this Cisco feature or do you simply block al=
l “rogue” wireless connections? Or do you have another me=
asure in place to deal with the unicast packet floods? Also, do your =
network engineers consider this a stopgap measure (“band-aid”) =
to deal with residences where you do not offer WiFi? <o:p></o:p></p><=
p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Please do sha=
re all of the details about this issue (or non-issue) on your network as yo=
u know them. And thanks a million! <o:p></o:p></p><p class=3DMsoNorma=
l><o:p> </o:p></p><p class=3DMsoNormal>Sheila Crowe<o:p></o:p></p><p c=
lass=3DMsoNormal>Montana State University ResNet<o:p></o:p></p><p class=3DM=
soNormal>406.994.4230<o:p></o:p></p><p class=3DMsoNormal>406.209.7243<o:p><=
/o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>P.S=
. I’m hoping to see all of you at the 2012 Student Technology Confere=
nce at Claremont Colleges! <o:p></o:p></p><p class=3DMsoNormal><o:p> <=
/o:p></p></div></body></html>=
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<p>
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