October 2012 - Test - lists.nanog.org

Dropping IPv6 Fragments
by Tom Taylor 05 Oct '12

05 Oct '12

Who drops IPv6 fragments in their network, under what circumstances? Tom Taylor

11 13

TOR Question
by Joseph Lappa 04 Oct '12

04 Oct '12

Hi, There was a thread on Nanog in January about TOR and deep buffers (http://seclists.org/nanog/2012/Jan/966) I have a follow-up, related question. Has anyone used a TOR switch to aggregate connections to from major network providers? For example, 2 or more 10GE ingress connections (pick your favorite CDNs) into one 10GE egress back to our router (which is at a remote location). We are worried that queue buffers are too small to handle the traffic going to the egress port. Thanks, Joe Lappa

1 0

Re: IPv4 address length technical design
by Johnny Eriksson 04 Oct '12

04 Oct '12

Valdis.Kletnieks(a)vt.edu wrote: > And the -10s and -20s were the major reason RFCs refer to octets > rather than bytes, as they had a rather slippery notion of "byte" > (anywhere from 6 to 9 bits, often multiple sizes used *in the > same program*). Not quite correct. Anywhere from 1 to 36 bits, and not spanning a 36-bit word boundary. Essentialy what is now known as a bit field. --Johnny

2 1

Re: 100.100.0.0/24
by Scott Weeks 04 Oct '12

04 Oct '12

--- joelja(a)bogus.com wrote: From: joel jaeggli <joelja(a)bogus.com> http://bgp.he.net/net/100.100.0.0/24#_bogon A surprising number of large transit ASes appear to be more than willing to accept this prefix from AS4847. I'd be a lot happier if there were fewer. ------------------------------------------------- To save others the time of looking it up... :-) http://tools.ietf.org/html/rfc6598 scott

1 0

Technical contact at XO/Concentric
by Knut A. Syed 04 Oct '12

04 Oct '12

Hi, If anyone from XO/Concentric is on on the list or anyone has a technical contact who can help with connectivity issues to their hosted Web-sites, please pass this along to the right person/team or respond to me off-list. Some of our customers are having problems connecting to Web-services hosted by XO/Concentric. The problem is limited to customers within a certain /17 allocation we have (82.134.0.0/17). Ping and connections to the SMTP-service on the same destination IP are fine. But when the customers try to connect to the HTTP-service tcpdumps shows that no packets are returned. We have tried Customer Care to no help. TIA! Kind Regards, Knut A. Syed

1 0

Rogers.ca fiber contact
by Dennis Burgess 03 Oct '12

03 Oct '12

Have a fiber circuit that is getting inconsistent speeds to the net L Need an IPERF test on rogers network to verify bandwidth. Dennis Burgess, Mikrotik Certified Trainer Author of "Learn RouterOS- Second Edition <http://www.wlan1.com/product_p/mikrotik%20book-2.htm> " Link Technologies, Inc -- Mikrotik & WISP Support Services Office: 314-735-0270 <tel:314-735-0270> Website: http://www.linktechs.net <http://www.linktechs.net/> - Skype: linktechs <skype:linktechs?call> -- Create Wireless Coverage's with www.towercoverage.com <http://www.towercoverage.com/> - 900Mhz - LTE - 3G - 3.65 - TV Whitespace 5-Day Advanced RouterOS Workshop - Oct 8th 2012 - St. Louis, MO, USA <http://www.wlan1.com/RouterOS_Training_p/5d-stl-training-oct2012.htm>

1 0

Re: IPv4 address length technical design
by Scott Weeks 03 Oct '12

03 Oct '12

--- jra(a)baylink.com wrote: From: Jay Ashworth <jra(a)baylink.com> So the address space for IPv8 will be... </troll> ------------------------------------------------- Jim says: "IPv8 - 43 bits (3+8+32) There is a natural routing hierarchy with IPv8 addressing....8 regions, 256 distribution centers in each region and full 32 bit Internets from there. IPv8 addresses can fit inside the IPv6 address fields." >;-) scott

2 1

Internet routing table "completeness" monitoring?
by ML 03 Oct '12

03 Oct '12

Has anyone put in place a method to identify if one their BGP peers suddenly withdraws X% of their prefixes? e.g I should expect ~420k prefixes in a "complete"[1] routing table from a transit peer today. If suddenly I'm only getting 390k prefixes I'd guess a major network was depeered or similiar. If so how are people doing this? SNMP MIB, screen scrape? [1] Varying levels of completeless apply.

9 8

So what's the deal with 10Gbase-T
by Andreas Echavez 03 Oct '12

03 Oct '12

Hey guys, Does anyone here have experience running copper 10Gbase-T networks? It seems like the standard just died out. For us it would make a lot of sense for our applications -- even if throughput and latency aren't as great. If anyone out there knows of any *copper* 10 gig-t switches (48 port?), I'd be interested to hear your experiences. I can't seem to find any high-density ones from major vendors. Thanks, Andreas

7 8

RE: Internet routing table "completeness" monitoring?
by Joseph Jackson 03 Oct '12

03 Oct '12

Not sure I don't have any non-cisco BGP routers. Sorry! -----Original Message----- From: Neil Robst [mailto:neil.robst@kit-digital.com] Sent: Wednesday, October 03, 2012 8:54 AM To: Joseph Jackson; ml(a)kenweb.org; North American Networking and Offtopic Gripes List Subject: RE: Internet routing table "completeness" monitoring? This is still only possible on Cisco routers, isn't it - Foundry/Brocade gear doesn't currently include an SNMP OID for this info, does it? -----Original Message----- From: Joseph Jackson [mailto:jjackson@aninetworks.net] Sent: 03 October 2012 14:51 To: ml(a)kenweb.org; North American Networking and Offtopic Gripes List Subject: RE: Internet routing table "completeness" monitoring? I have cacti graph the amount of prefixes announced and withdrawn from a BGP peer on each BGP router. -----Original Message----- From: ML [mailto:ml@kenweb.org] Sent: Tuesday, October 02, 2012 11:43 PM To: North American Networking and Offtopic Gripes List Subject: Internet routing table "completeness" monitoring? Has anyone put in place a method to identify if one their BGP peers suddenly withdraws X% of their prefixes? e.g I should expect ~420k prefixes in a "complete"[1] routing table from a transit peer today. If suddenly I'm only getting 390k prefixes I'd guess a major network was depeered or similiar. If so how are people doing this? SNMP MIB, screen scrape? [1] Varying levels of completeless apply.

1 0