January 2011 - Test - lists.nanog.org

Experiences with Comcast Ethernet
by Dylan Ebner 05 Jan '11

05 Jan '11

My company has about 2 dozen Comcast business cable accounts at satellite offices around the Midwest. We are looking at adding an additional ISP to the mix and we are thinking of purchasing an Ethernet circuit from Comcast in an attempt to increase performance on those connections by keeping all the traffic within Comcast's network. Comcast, of course, has assured us this will result in "noticeable" speed increases for those accounts. I am more weary. Does anyone have any experience with Comcast's ethernet offerings? How reliable are they? Do Comcast cable connections see a significant performance improvement? Dylan Ebner, Network Engineer Consulting Radiologists, Ltd. 1221 Nicollet Mall, Minneapolis, MN 55403 ph. 612.573.2236 fax. 612.573.2250 dylan.ebner(a)crlmed.com<mailto:dylan.ebner@crlmed.com> www.consultingradiologists.com<http://www.consultingradiologists.com>

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RE: Experiences with Comcast Ethernet
by David Hubbard 04 Jan '11

04 Jan '11

With the way their peering is these days, that probably would result in a huge improvement; we have complaints all over the northeast from comcast users who are getting poor connectivity to websites we host as a result of the overloaded Comcast->Level3 links and nothing we can do about it even though we both share a non-Level3 provider since Comcast wants the traffic to head out the bad links. David > -----Original Message----- > From: Dylan Ebner [mailto:dylan.ebner@crlmed.com] > Sent: Tuesday, January 04, 2011 4:05 PM > To: North American Network Operators Group > Subject: Experiences with Comcast Ethernet > > My company has about 2 dozen Comcast business cable accounts > at satellite offices around the Midwest. We are looking at > adding an additional ISP to the mix and we are thinking of > purchasing an Ethernet circuit from Comcast in an attempt to > increase performance on those connections by keeping all the > traffic within Comcast's network. Comcast, of course, has > assured us this will result in "noticeable" speed increases > for those accounts. I am more weary. Does anyone have any > experience with Comcast's ethernet offerings? How reliable > are they? Do Comcast cable connections see a significant > performance improvement? > > Dylan Ebner, Network Engineer > Consulting Radiologists, Ltd. > 1221 Nicollet Mall, Minneapolis, MN 55403 > ph. 612.573.2236 fax. 612.573.2250 > dylan.ebner(a)crlmed.com<mailto:dylan.ebner@crlmed.com> > www.consultingradiologists.com<http://www.consultingradiologists.com> > > >

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Re: RES: Software For Telcos
by Scott Weeks 04 Jan '11

04 Jan '11

-----Mensagem original----- De: jacob miller [mailto:mmzinyi@yahoo.com] I have been wondering what type of Software do top telcos use. The tracking of Customer circuits to ensure that from marketing,sales,accounts and technical department everything to do with the circuits has to be tracked. Anyone with any help in regards to top software that can be used to run such a telco to ensure that world class service is obtained will be crucial. -------------------------------------------------------------- For a while I was at one that originally had 750K phone lines (now around 500K) and about 100K DSL subs in addition to the leased-line and other types of customers. In the NOC, many different vendor's EMSs reported into Netcool. For example, Fujitsu's Netsmart watched and managed the fiber plant and sent any alarms up to Netcool. When the NOCites saw the red tomato on the big board, they'd go into Netsmart and do the detail work before sending it up to Tier 2 folks. There were many different systems that did the above, including SAM for the Alcatel 7x50 routers. On the other side of the house: PeopleSoft CRM. But if not designed correctly from the start it can become a real mess. Same for Netcool. Don't piecemeal them. Do the design *then* do the implementation. Some CxO-type managers like to try to do those things in parallel to 'synergize' efforts and save money. They don't really understand why the engineering part takes so long. Finally, GOOD LUCK with a telco in today's environment... --- takashi(a)cpqd.com.br wrote: From: "Takashi Tome" <takashi(a)cpqd.com.br> Say in other words, top telco's equipment vendors have their own sw team or third-party suppliers. Equipment vendors are Alcatel, Lucent (ex-AT&T), Ericsson, Nokia, etc. You can see at those companies' web site to check. ------------------------------------------- Alcatel and Lucent are one and the same since a few years ago. scott

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How many legitimate cases when Origin AS in BGP announcement changed by another AS?
by Akmal Shahbaz 04 Jan '11

04 Jan '11

Hi I am looking for example routing policies when any AS receiving BGP advertisement changes Origin AS in BGP AS set attribute to remove the received AS number and puts its own AS number.[legitimate cases] 1. customer AS advertises the prefix however provider AS announce the aggregate(super prefix) shall put it's AS number in the BGP announcement.It may or may not suppress the customer BGP announcement based on multihoming.Well, we may say this is not a change in origin AS but new BGP announcement. 2.Can it happen in the case of private/public peering ? 3.ASes managed by same organization? 4.Are there cases it can be done for sub prefix or exact prefix announcement forwarding? Thank you. Akmal PhD Student MMLAB,SNU,Korea --- On Tue, 1/4/11, nanog-request(a)nanog.org <nanog-request(a)nanog.org> wrote: From: nanog-request(a)nanog.org <nanog-request(a)nanog.org> Subject: NANOG Digest, Vol 36, Issue 7 To: nanog(a)nanog.org Date: Tuesday, January 4, 2011, 12:00 PM Send NANOG mailing list submissions to nanog(a)nanog.org To subscribe or unsubscribe via the World Wide Web, visit https://mailman.nanog.org/mailman/listinfo/nanog or, via email, send a message with subject or body 'help' to nanog-request(a)nanog.org You can reach the person managing the list at nanog-owner(a)nanog.org When replying, please edit your Subject line so it is more specific than "Re: Contents of NANOG digest..." Today's Topics: 1. Re: Router only speaks IGP in BGP network (Tarig Ahmed) 2. Software For Telcos (jacob miller) 3. 2010 IPv4 (and IPv6) Address Use Report (Iljitsch van Beijnum) 4. RES: Software For Telcos (Takashi Tome) ---------------------------------------------------------------------- Message: 1 Date: Tue, 4 Jan 2011 09:00:27 +0300 From: Tarig Ahmed <tariq198487(a)hotmail.com> Subject: Re: Router only speaks IGP in BGP network To: Jeff Aitken <jaitken(a)aitken.com> Cc: nanog(a)nanog.org Message-ID: <BLU0-SMTP1103BD6461EF9DAA4EAFAD0BB080(a)phx.gbl> Content-Type: text/plain; charset="us-ascii"; format=flowed; delsp=yes On Jan 3, 2011, at 8:02 PM, Jeff Aitken <jaitken(a)aitken.com> wrote: > On Sat, Dec 25, 2010 at 08:52:42AM -0500, ML wrote: >> If you're only redistributing 10 prefixes into OSPF? Problem? > > I know I'm a little late to this thread, but figured I'd point out one > reason why this can be very dangerous: > > In IOS, you use a route-map to control redistribution between > protocols. > For example, if you want to redist just those BGP prefixes tagged > with a > specific community into OSPF, you will probably configure something > that > looks like this: > > route-map bgp-to-ospf permit 10 > match community $COMMUNITY > ! > route-map bgp-to-ospf deny 20 > ! > router ospf $PID > redistribute bgp $ASN subnets route-map bgp-to-ospf > > > Now, consider the following failure scenarios: > > 1. Someone typo's a BGP config elsewhere in your network and attaches > $COMMUNITY to a whole bunch more routes... say, all 350k being sent > by your > upstream provider. *oops* > > 2. An engineer thinks that there's something wrong with the > redistribution > and decides to temporarily disable it as part of the troubleshooting > process. He types the following: > > conf t > router ospf $PID > no redistribute bgp $ASN subnets route-map bgp-to-ospf > > *boom* > > He just dumped all BGP routes into OSPF, due to the way IOS parses the > command: it removes the route-map but leaves the redistribution > intact. > To be fair, Cisco does provide you with tools to mitigate this risk > (see > the "redistribute maximum-prefix" command) but the point is that > this is > a fairly easy mistake to make. > > At the end of the day, the reason that many folks advise against the > redistribution of BGP into an IGP is that it sets the stage for a > seemingly > insignificant mistake to cause a not-so-insignificant outage. > > > --Jeff > > > This is an interesting point. But why cisco *no* command does not remove the redistribute , I think it should do. Thanks ------------------------------ Message: 2 Date: Mon, 3 Jan 2011 23:04:14 -0800 (PST) From: jacob miller <mmzinyi(a)yahoo.com> Subject: Software For Telcos To: nanog(a)nanog.org Message-ID: <360440.86064.qm(a)web39502.mail.mud.yahoo.com> Content-Type: text/plain; charset=us-ascii Hi, I have been wondering what type of Software do top telcos use. The tracking of Customer circuits to ensure that from marketing,sales,accounts and technical department everything to do with the circuits has to be tracked. Anyone with any help in regards to top software that can be used to run such a telco to ensure that world class service is obtained will be crucial. Regards, Jacob ------------------------------ Message: 3 Date: Tue, 4 Jan 2011 12:29:48 +0100 From: Iljitsch van Beijnum <iljitsch(a)muada.com> Subject: 2010 IPv4 (and IPv6) Address Use Report To: NANOG list <nanog(a)nanog.org> Message-ID: <49A2BD30-5F17-40FA-A862-FF8C7496DAE0(a)muada.com> Content-Type: text/plain; charset=us-ascii [ (Non-cross)posted to NANOG, PPML, RIPE IPv6 wg, Dutch IPv6 TF. ] On the web: IPv4: http://www.bgpexpert.com/addrspace2010.php IPv6: http://www.bgpexpert.com/addrspace-ipv6-2010.php The IPv4 one is included below: 2010 IPv4 Address Use Report As of January 1, 2011, the number of unused IPv4 addresses is 495.66 million. Exactly a year earlier, the number of available addresses was 721.06 million. So we collectively used up 225.4 million addresses in 2010. 35 of the 256 the /8s that make up the IPv4 address space have the status "reserved". 0 and 127 have special meaning and can't be used for normal purposes. 224 - 239 are used for multicast and 240 - 255 are "reserved for future use". With only about two years worth of IPv4 addresses remaining on the shelves, it would seem that that future is here now, but unfortunately, pretty much all operating systems balk at using a "reserved" address. So unreserving those addresses means upgrading EVERY system connected to the Internet. If we're going to do that, we may as well skip those reserved IPv4 addresses and upgrade to IPv6. Last but not least, there's block 10, which is the largest of the three address blocks set aside for private use. The others, 172.16.0.0/12 and 192.168.0.0/16, don't show up as reserved, but are obviously not available for regular use. This makes the total number of usable IPv4 addresses is (256 - 35) * 2^24 - 2^20 - 2^16 = 3706.65 million addresses. The "IANA global pool" consists of 7 /8s (117.44 million) are still unused (unallocated): 39/8, 102/8, 103/8, 104/8, 106/8, 179/8 and 185/8. But there's also a lot of unused space hiding in the "allocated" and "legacy" categories. Each RIR publishes a list of address blocks further delegated to ISPs or end users every day on their FTP servers. If we add up all those blocks, this comes out to 3210.99 million addresses. So the total number of usable-but-unused IPv4 addresses is 3706.65 - 3210.99 = 495.66 million. Going back to the IANA global pool, these are the changes over the past year: Delegated Blocks +/- 2010 to/status AfriNIC 3 +1 APNIC 42 +8 ARIN 35 +4 LACNIC 8 +2 RIPE NCC 34 +4 LEGACY 92 UNALLOCATED 7 -19 There is an agreement between IANA and the RIRs that each RIR will get one of the last five /8s. APNIC has been getting two /8s every three months like clockwork in 2010. If this continues, they'll be getting numbers 7 and 6 later this month, and then the final distribution will look like this: Delegated Blocks +/- 2010 to/status AfriNIC 4 APNIC 45 ARIN 36 LACNIC 9 RIPE NCC 35 LEGACY 92 UNALLOCATED - At this point, it becomes very interesting what the status of the legacy space is, exactly. The legacy blocks are each "administered" by one of the RIRs, but does that mean that that RIR is free to further delegate that space to ISPs and end users? There are 146.92 million unused addresses in legacy space, including 16.65 million returned by Interop a few months ago. This is the used versus unused address space administered by each RIR: Legacy Allocated total unused total unused AfriNIC 33.55 24.85 50.33 27.06 APNIC 100.66 22.32 704.64 44.38 ARIN 654.31 60.55 587.20 56.21 LACNIC - - 134.22 37.39 RIPE NCC 67.11 5.77 570.43 67.38 IANA 671.09 16.65 - - AfriNIC used up 8.95 million addresses last year. So their current unused allocated space is good for another three years (if nothing changes) and their final /8 is worth another almost two years. If they get to use their legacy space, that buys them another 2.5 years. So unless IPv4 address use <em>really</em> takes off in Africa, AfriNIC will be handing out addresses for at least three or four years. APNIC is at the opposite end of the spectrum, using up no less than 126.22 million new IPv4 addresses last year. Even if they get to use the legacy space they administer on top of three of the last seven /8s and, it's hard to see how APNIC can avoid having to tell people "no" before the year is out. However, there is a caveat: in the 2010 APNIC records, there is 6.65 million addresses worth of space that isn't in the 2011 records. Part of this is address space returned to APNIC. In other cases, an address block delegated in a previous year expands or shrinks retroactively. Depending on what the underlying reason for these changes is, the actual rate at which APNIC and the other RIRs are giving out address space may be different from what it seems to be at first glance. ARIN, LACNIC, and the RIPE NCC used up 54.55, 17.29, and 75.45 million addresses, respectively, in 2010. However, ARIN saw 27.24 million addresses returned, including the 16.65 million from Interop, which is administered in the ARIN records even though the IANA list doesn't reflect this. For AfriNIC, LACNIC and the RIPE NCC the numbers of addresses that came back were 0.31, 0.22, and 22.62 million, respectively. With respect to running out of addresses, it's important to realize that the Pareto principle (the 80/20 rule) applies: out of the 7686 address blocks given out last year, only 392 (5 percent) were blocks larger than 100,000 addresses, but those were responsible for 82 percent of the address <em>space</em> given out. Even when the RIRs are no longer able to give out those large blocks, they may still be able to fulfill the requests for address blocks smaller than 10,000 addresses. Last year, 6425 such blocks were given out, totaling 14.03 million addresses. It really only takes a single address to be in the content business; it's the ISPs that need a continuous supply of new addresses to connect new customers. So the address shortages looming beyond the summer will hit ISPs and their broadband/mobile customers first and foremost, and the content industry to a much lesser degree. The top 15 IPv4 address holding countries: 2011-01-01 2010-01-01 Increase Country 1 - US 1519.53 M 1495.13 M 1.6% United States 2 - CN 277.64 M 232.45 M 19.4% China 3 - JP 186.82 M 177.15 M 5.5% Japan 4 - EU 151.80 M 149.48 M 1.6% Multi-country in Europe 5 (6) KR 103.50 M 77.77 M 33.1% Korea 6 (5) DE 91.61 M 86.51 M 5.9% Germany 7 (9) GB 82.25 M 74.18 M 10.9% United Kingdom 8 - CA 79.53 M 76.96 M 3.3% Canada 9 - FR 79.29 M 75.54 M 5.0% France 10 - AU 49.10 M 39.77 M 23.5% Australia 11 - BR 40.24 M 33.95 M 18.5% Brazil 12 - IT 37.14 M 33.50 M 10.9% Italy 13 - RU 34.66 M 28.47 M 21.7% Russia 14 - TW 31.93 M 27.10 M 17.8% Taiwan 15 (19) IN 28.70 M 19.42 M 47.8% India Because the US holds so much space, the increase of 25 million addresses seems small, but that's still more than 10% of the address space given out in 2010. China's growth is slowing down a little at 45 million addresses last year compared to 50 million in 2009. But other countries in Asia are picking up the slack and then some: Korea keeps using up large amounts of address space, and India is now also picking up the pace. The US now has 47.3% of the address space in use, down from 50.1% a year ago. The other countries in the top 15 collectively hold 39.7%, up from 38%. That leaves 13% for the rest of the world, up from 12%. Note that I slightly changed the way addresses are counted: previously, all the legacy blocks that didn't have an RIR listed were assumed to be used 100%. But with the return of most of the Interop block this is no longer the case: although ARIN isn't listed as administering the 45/8 block, they actually are and only have 45.0.0.0/15 listed as in use. ------------------------------ Message: 4 Date: Tue, 4 Jan 2011 09:34:53 -0200 From: "Takashi Tome" <takashi(a)cpqd.com.br> Subject: RES: Software For Telcos To: <nanog(a)nanog.org> Message-ID: <E723F40B750C0D47B43CDC67EFC3806E1CE4CE(a)MAILSRV4.aquarius.cpqd.com.br> Content-Type: text/plain; charset="iso-8859-1" Hi Jacob, Generally, top telcos use software made by top telco's software vendors... of course :-) Say in other words, top telco's equipment vendors have their own sw team or third-party suppliers. Equipment vendors are Alcatel, Lucent (ex-AT&T), Ericsson, Nokia, etc. You can see at those companies' web site to check. Which kind of software: - system and service management; - CRM; - switching, IMS, etc; - billing; and so on. Hope it works. Takashi Tome takashi(a)cpqd.com.br www.cpqd.com.br -----Mensagem original----- De: jacob miller [mailto:mmzinyi@yahoo.com] Enviada em: ter?a-feira, 4 de janeiro de 2011 05:04 Para: nanog(a)nanog.org Assunto: Software For Telcos Hi, I have been wondering what type of Software do top telcos use. The tracking of Customer circuits to ensure that from marketing,sales,accounts and technical department everything to do with the circuits has to be tracked. Anyone with any help in regards to top software that can be used to run such a telco to ensure that world class service is obtained will be crucial. Regards, Jacob ------------------------------ _______________________________________________ NANOG mailing list NANOG(a)nanog.org https://mailman.nanog.org/mailman/listinfo/nanog End of NANOG Digest, Vol 36, Issue 7 ************************************

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RES: RES: Software For Telcos
by Takashi Tome 04 Jan '11

04 Jan '11

HAHA! Good joke! That was true some 30 years ago... Actually, I think the problem is quite different. Big telco's network is a very complex thing - well, you all can say, Internet is too... But if we see some "similar" business like aircraft-defense and professional video market, we see some similarities: there are a lot of tricks and "non-documented standards" that make those software a kind of mistery for foreigners. Put in other words, software knowledge is not enough, you must have a deep understanding of that business and the history of the system itself... Takashi -----Mensagem original----- De: Randy Bush [mailto:randy@psg.com] Enviada em: terça-feira, 4 de janeiro de 2011 11:49 Para: Takashi Tome Cc: NANOG Operators' Group Assunto: Re: RES: Software For Telcos > Generally, top telcos use software made by top telco's software > vendors... of course :-) in my miniscule experience, they have large masses of engineers with unrequited NIH and roll their own as much as possible. after all, who could make something suitable for their oh so special needs. randy

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Software For Telcos
by jacob miller 04 Jan '11

04 Jan '11

Hi, I have been wondering what type of Software do top telcos use. The tracking of Customer circuits to ensure that from marketing,sales,accounts and technical department everything to do with the circuits has to be tracked. Anyone with any help in regards to top software that can be used to run such a telco to ensure that world class service is obtained will be crucial. Regards, Jacob

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RES: Software For Telcos
by Takashi Tome 04 Jan '11

04 Jan '11

Hi Jacob, Generally, top telcos use software made by top telco's software vendors... of course :-) Say in other words, top telco's equipment vendors have their own sw team or third-party suppliers. Equipment vendors are Alcatel, Lucent (ex-AT&T), Ericsson, Nokia, etc. You can see at those companies' web site to check. Which kind of software: - system and service management; - CRM; - switching, IMS, etc; - billing; and so on. Hope it works. Takashi Tome takashi(a)cpqd.com.br www.cpqd.com.br -----Mensagem original----- De: jacob miller [mailto:mmzinyi@yahoo.com] Enviada em: terça-feira, 4 de janeiro de 2011 05:04 Para: nanog(a)nanog.org Assunto: Software For Telcos Hi, I have been wondering what type of Software do top telcos use. The tracking of Customer circuits to ensure that from marketing,sales,accounts and technical department everything to do with the circuits has to be tracked. Anyone with any help in regards to top software that can be used to run such a telco to ensure that world class service is obtained will be crucial. Regards, Jacob

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Router only speaks IGP in BGP network
by Tarig Yassin 04 Jan '11

04 Jan '11

Dear all In my network, I have a router in a middle only speaks OSPF. is there any solution (without redistribute BGP into OSPF) for this kind of problem? thanks -- Tarig Y. Adam CTO - SUIN www.suin.edu.sd

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[NANOG-announce] Reminder: NANOG 51 registration fees change from the standard fee to the late fee on 01/08/2010
by David Meyer 03 Jan '11

03 Jan '11

Register now! See you in Miami. Dave (for the NANOG PC) _______________________________________________ NANOG-announce mailing list NANOG-announce(a)nanog.org https://mailman.nanog.org/mailman/listinfo/nanog-announce

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Re: The tale of a single MAC
by GP Wooden 02 Jan '11

02 Jan '11

Fresh install and the NICs are Broadcom b57 10/100/1000, I believe. ----- Reply message ----- From: "Randy McAnally" <rsm(a)fast-serv.com> Date: Sun, Jan 2, 2011 8:53 am Subject: The tale of a single MAC To: "Graham Wooden" <graham(a)g-rock.net>, <nanog(a)nanog.org> ---------- Original Message ----------- From: Graham Wooden <graham(a)g-rock.net> > Hi there, > > I encountered an interesting issue today and I found it so bizarre > so I thought I would share it. > > I brought online a spare server to help offload some of the recent > VMs that I have been deploying. Around the same time this new > machine (we¹ll call it Server-B) came online, another machine which > has been online for about a year now stopped responding to our > monitoring (and we¹ll name this Server-A). I logged into the switch > and saw that the machine that stopped responding was in the same > VLAN as this newly deployed, and then quickly noticed that Server- > A¹s MAC address was now on Server-B¹s switch port. ³What the ...² > was my initial response. > Fresh OS install from scratch or did you load an image from an existing server? What make/model of on-board NICs? -- Randy M.

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