March 2012 - Test - lists.nanog.org

Re: shared address space... a reality!
by Joel jaeggli 14 Mar '12

14 Mar '12

On 3/14/12 00:06 , Frank Habicht wrote: > Hi, > > On 3/14/2012 9:42 AM, Joel jaeggli wrote: >> On 3/13/12 23:29 , Joel jaeggli wrote: >>> On 3/13/12 23:22 , Christopher Morrow wrote: >>>> NetRange: 100.64.0.0 - 100.127.255.255 >>>> CIDR: 100.64.0.0/10 >>>> OriginAS: >>>> NetName: SHARED-ADDRESS-SPACE-RFCTBD-IANA-RESERVED >>> >>> Already updated my martians acl and deployed it internally... >> >> this also means you should probably filter the 6to4 mapped address range >> from 2002:a40::/48 to 2002:a7f:ffff::/48 since those have no chance of >> making it home. > > is my hex going bad...? no mine is, or I'm lapsing into 10/8 > or should it be 2002:6440:: ...... 2002:6440::/48 to 2002:647f:ffff::/48 > is that the funny space for CGN? > > Frank >

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Xirrus Wireless
by Blake Pfankuch 14 Mar '12

14 Mar '12

I know this is a little outside of the traditional NANOG realm but... I have a customer looking at a fair number of Xirrus Wireless Arrays for 802.11a/b/g/n implementations and am looking for some real world insight into them. On the cover they look cool, the white papers look cool, but I am yet to find technical commentary from a real person on these devices. Looking at the XN line, and just curious if anyone has deployed these, supports these or knows anything about them. Thanks! Blake

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Re: Xirrus Wireless
by Pete Carah 14 Mar '12

14 Mar '12

On 03/13/2012 03:35 PM, Blake Pfankuch wrote: > Thanks Pete, that does help. Now hopefully I can get someone who has experience with 500+ devices running on a single one in a fairly small area (High School Gym). There was a thread about this a couple of months back, I'm pretty sure it was after last November (but not absolutely sure); lots of discussion about density and Xirrrus was mentioned. My personal experience with Xirrus is certainly not high-density, and the "real" hospital certainly copes with a bunch (though I'm guessing 20-30 users per AP from how many APs they have distributed among rooms. They seem to do a bunch of their device telemetry on 802.11 but there are also some more dedicated frequencies/protocols for medical devices. (even the IV pumps alarm at the nurse's station...) I do have some experience with full-duplex RF transceiver design, though, and the Xirrus configuration can't be easy to make work well. Not impossible, but difficult. -- Pete > > -----Original Message----- > From: Pete Carah [mailto:pete@altadena.net] > Sent: Tuesday, March 13, 2012 4:32 PM > To: nanog(a)nanog.org > Subject: Re: Xirrus Wireless > > On 03/13/2012 02:34 PM, Blake Pfankuch wrote: >> I know this is a little outside of the traditional NANOG realm but... >> >> I have a customer looking at a fair number of Xirrus Wireless Arrays for 802.11a/b/g/n implementations and am looking for some real world insight into them. On the cover they look cool, the white papers look cool, but I am yet to find technical commentary from a real person on these devices. Looking at the XN line, and just curious if anyone has deployed these, supports these or knows anything about them. > I can only speak from indirect experience; the rehab place where my wife is staying for a bit uses 4 or 5 of them (older, probably not current, flying-saucer-like boxes suspended from the ceiling at hallway > junctions) and there, at least, they appear to work pretty well. The particular ones don't appear to my laptop to do 11a. However, I don't think there is any significant user density just from watching the nifty directional light display, so this may not mean much (I'd guess 3 to 10 users over the whole building including smartphones and a couple of pieces of medical equipment that isn't used much). Also there is no IT (or any real technical maint) guy on-premises to talk to so I can't ask about any other aspect. > > The local real hospital uses a Cisco system (or at least Cisco APs; don't know about the AP manager box) which really does appear to work well; I'd guess several hundred APs with lots of full-time medical gear, and a "guest" network which is behind a rather draconian firewall (wouldn't let me ssh out to a non-standard port (65k range), for example; I had to fix myself a 443 ssh port for the time we spent there a couple of months ago... Blocked 25 outgoing; I don't blame them for that, however they also blocked 465 (but allowed 587)). > > I suspect if I wanted 2.4-only I'd go with ubiquiti, but I don't have any experience with them, and their "unifi" boxes don't (yet) come in 5gig. And they don't appear to have independent APs in each box, though I don't know how well the "directional" antennas in the Xirrus actually separate things; even a 100mw transmitter may well overwhelm all the other local receivers unless there is a bunch of shielding inside the enclosure (and maybe even then...) If 802.11 was frequency-split like the cell system it would help such systems a bunch. > > -- Pete > >> Thanks! >> >> Blake >> > >

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SNMP monitoring of routing tables
by Walter Keen 13 Mar '12

13 Mar '12

Trying to work on an interesting project, where it would be nice to monitor the routing table of a collection of routers, store it, and look at it later, as a snapshot of what the routing table for a particular router looked at a particular time. All the information I'm wanting (route entry, nexthop, etc) is available via snmp on the ip-route mib I believe, and needs to stay fairly generic, or equipment-agnostic. Does anyone know of an existing project to do this before I start trying to make one? Walter Keen

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Telstra contact
by Robert Lusby 13 Mar '12

13 Mar '12

Anyone from the Telstra NOC lurking - or can pass on a Telstra technical contact? Having no luck through the usual channels. Looking to utilise some data from some cables you have lurking around. Ideally someone with global net ops insight rather than local coverage. Many thanks, Robert.

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CISCO ASA Botnet Traffic Filter contact off-list
by Jeff Fisher 13 Mar '12

13 Mar '12

Hi, Does anyone have a contact at CISCO that deals with their ASA botnet filtering software? I'm having trouble finding out why our network is listed. Thanks, Jeff

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HSBC - Canada / US Contact off list
by Payam Poursaied 13 Mar '12

13 Mar '12

Hi Can someone from HSBC (specially Canada) who is involved in network operation contact me off-list. Some of our customers which get IP address from specific network blocks, could not reach hsbc.ca. follow-up with internet banking staff, customer support, and .., did not point us to the right person. Thnx

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Whitelist of update servers
by Maverick 12 Mar '12

12 Mar '12

Is there a whitelist that applications have to talk to in order to update themselves?

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US withdraws IANA RFP, ‘no suitable responses’
by Henry Linneweh 12 Mar '12

12 Mar '12

http://www.theregister.co.uk/2012/03/11/icann_loses_one_horse_race/ -Henry

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Ciena CN4200 documentation
by Brian Talley 12 Mar '12

12 Mar '12

Does anyone have a user manual and/or configuration guide for a Ciena CN4200? I tried contacting their technical publication phone number and email but never heard back. If anyone has anything that's more in-depth than marketing material, please contact me off-list. I'm primarily interested in how to troubleshoot "loss of frame" messages and what the front panel LED states mean, but anything will help. TIA, BT -- Brian Talley Network Engineer btalley(a)photobucket.com

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