October 1998 - Test - lists.nanog.org

Gigarouter performance
by Rogerio Alvarez - DRS23 16 Oct '98

16 Oct '98

I know that these boxes work well, theoretically, but I really want to know if any major ISP is using gigarouters on their core. Another issue is, if I have 30 ATM PVC�s over an OC-12 interface, how well this box will treat , it will provide QoS for all the PVC�s without impact the other services? Rogerio

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Re: SONET ring questions
by Sean Donelan 15 Oct '98

15 Oct '98

pete(a)cobra.BRass.COM (Peter Polasek) writes: >1) Bell Atlantic assures us that, because of the redundancy, we can > expect 100% uptime from the OC-12. I would like feedback as to > whether this is a realistic portrayal of the SONET environment. 100% uptime meaning Bell Atlantic will pay you some small token amount when it fails? or 100% uptime meaning it will never fail? Figure out how much Bell Atlantic will pay you, and compute your risk factor. However, you are getting into the insanity region of availability vs. disaster planning, category 5 hurricane, regional firestorm, sabotage or terroist attack, etc. Yes, all have happened, and will happen again. But paying a bigger insurance premium may be cheaper for these extremes. Even a perfectly functioning SONET ring will have some delay as the APS switches to the protect circuit. So make sure your application can tolerate whatever the maximum switching delay. Most carriers consider SONET outages of less than 60ms 'normal' and an overall SONET end-user restoral of 2 seconds 'acceptable.' SONET also has its own set of hardware failures (e.g. APS controller failure), user errors (e.g. improper provisioning, improper maintenance), and the dreaded multiple failure modes (e.g. a fiber cut during a Forced Switched, double Forced Switches in the same ring at the same time, and other types of ring partitions), and software/firmware bugs. Humans are always a single point of failure in any system. In the last carrier summary report I saw the number of SONET failures was very small, but was greater than zero. The number of carriers reporting was also small, making any statistical relevance of the numbers virtually nill. On average less than 5.5 SONET outages a year were reported across 7 carriers. >2) We have the option of using either single-mode or multi-mode fiber > OC-3 connections - what factors should be considered in selecting > the fiber media type. Distance and equipment. >3) Which routers should be used. The options are 3com NB-II's DPE+ > (dual CPU), Cisco 7200 series, or Cisco 7500 (each router will > have at least two 100Base-T LAN ports). OK, I know the 3com > suggestion is a loaded question for this list, but has anybody > used the 3com's in this capacity? We are a 3com shop that is > considering switching to Cisco - this is a significant decision > because switching will require us to continue to maintain the > existing 3com environment (~500 routers) and the new Cisco > routers. 3com is more likely to jump when when a customer with 500 3com routers has a problem than cisco will jump for someone with only a couple of cisco routers. Assuming cisco will even agree to sell their favored products to anyone without their seal of approval. And you already know the capabilities and operation of 3com. On the other hand, cisco's SONET products have had the extensive testing and feedback from a number of noted luminaries/customers who haven't been shy about encourging cisco to rectify any apparent shortcomings. So you won't be the leading edge trailblazing customer. And since its a good bet Bell Atlantic will blame any problems you encounter on your CPE equipment, using the CPE equipment which Bell Atlantic 'related subsidaries' resells may cut short at least one round of finger-pointing. -- Sean Donelan, Data Research Associates, Inc, St. Louis, MO Affiliation given for identification not representation

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Internet 1, Backhoe 0
by Jeff Weisberg 15 Oct '98

15 Oct '98

rirving(a)onecall.net asked: | | Someone *Kill* a Back-Hoe for me..... I was watching the local (Philly) news last night, and saw a story that needed to be shared. [Atlantic County, NJ] While attempting to wreck havoc on the world's telecommunications infrastructure, a backhoe mistook a gas main as a fiber optic cable. The evil yellow beast was destroyed in the resulting fireball. --jeff

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IP address space management
by Brandon Ross 15 Oct '98

15 Oct '98

We are in need of a software package to manage our IP space. We've looked at several products on the market but haven't found anything that really suits an ISP's needs very well. Does anyone know of anything on the market that works well? It should understand CIDR and be hierarchical. Most products we've seen have been aimed more at the Enterprise market and include a lot of things we don't need like interfaces to DNS and DHCP. Any suggestions? -- Brandon Ross Network Engineering 404-815-0770 800-719-4664 Director, Network Engineering, MindSpring Ent., Inc. info(a)mindspring.com ICQ: 2269442 Stop Smurf attacks! Configure your router interfaces to block directed broadcasts. See http://www.quadrunner.com/~chuegen/smurf.cgi for details.

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Re: SONET ring questions
by Dave Israel 15 Oct '98

15 Oct '98

> 1) Bell Atlantic assures us that, because of the redundancy, we can > expect 100% uptime from the OC-12. I would like feedback as to > whether this is a realistic portrayal of the SONET environment. Assuming the primary and backup paths are not in the same cable anywhere (don't laugh, it happens), the chances of the OC-12 itself failing inside Bell land are tiny. (Of course, if your local loop gets assaulted by a backhoe, you're in trouble.) > 2) We have the option of using either single-mode or multi-mode fiber > OC-3 connections - what factors should be considered in selecting > the fiber media type. Single mode goes farther. Multi-mode is cheaper. If you've got relatively short cables, save some money and use multi-mode. If you're dragging fiber all the way across the building, or between buildings on a campus, use single-mode. > 3) Which routers should be used. The options are 3com NB-II's DPE+ > (dual CPU), Cisco 7200 series, or Cisco 7500 (each router will > have at least two 100Base-T LAN ports). OK, I know the 3com > suggestion is a loaded question for this list, but has anybody > used the 3com's in this capacity? We are a 3com shop that is > considering switching to Cisco - this is a significant decision > because switching will require us to continue to maintain the > existing 3com environment (~500 routers) and the new Cisco > routers. If you go Cisco, I'd recommend the 7500 series. The 7200 series won't handle two OC-3's and two fast ethers. You'll drop packets.

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TCP Sliding windows utilities for NT 4.0
by Joe Graham 15 Oct '98

15 Oct '98

Hi All, Is there a Utility to adjust the TCP sliding windows in NT 4.0 Ip (for the moment)? Please reply to jroy(a)netscape.net Best Regards, Jerry Roy

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CCIE
by Cathy Freed 15 Oct '98

15 Oct '98

BPI is a leading independent provider of superior-quality, high-performance, value-added systems integration backed by exceptional standards of support and service. We are currently seeking qualified candidates for the following position: Certified Cisco Internetwork Expert We have an immediate need for a CCIE. This position will provide Cisco expertise to 2 major BPI clients and will require the CCIE to work at these client sites. Salary negotiable and flexible. This position is located in beautiful Littleton, Colorado ( Just outside of Denver.) Relocation is covered. We will tailor this position around the needs of the right person. For immediate consideration, please email or fax your resume to Cathy Freed at cfreed(a)bpi.com or (303) 797-0327. Cathy Freed Corporate Account Executive Business Professional Staffing (303) 798-0613 x226 (303) 797-0327 cfreed(a)bpi.com www.bpi.com/bps

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RE: Gigarouter
by Greg Mirsky 15 Oct '98

15 Oct '98

My apologies to those offended by my note. I wouldn't argue about terminology so much. If GRF and GSR get into Gigarouter category - fine with me and my sincere congrats to all. What I've ment was that, as you all know, there are M40 out there and it's only the beginning of new and exciting era. And it wasn't 'vendor's shpil'. Again, sorry and good luck in pumping these Gigabytes! Greg > -----Original Message----- > From: Howard C. Berkowitz [SMTP:hcb@clark.net] > Sent: Thursday, October 15, 1998 11:05 AM > To: nanog(a)merit.edu > Subject: RE: Gigarouter > > Greg Mirsky observed, > > >Rogerio, > >these are not REAL gigarouters. Real once yet to come ;). Stay tuned > > > > Greg > > > > Or is it that the current ones are gigarouters, but the next > generation > will be terable? >

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Gigarouter performance
by Rogerio Alvarez - DRS23 15 Oct '98

15 Oct '98

I know that these boxes work well, theorically, but I really want to know if there is any ISP using them on their core, and how many traffic it�s supporting . Another issue is, if I have 30 ATM PVC�s over an OC-12 interface, how well this box will treat each one, it will be possible to provide QoS for these PVC�s inside the box without impact the others services. Rogerio

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Re: Gigarouter
by David Greer 15 Oct '98

15 Oct '98

Rogerio, I haven't the need for that kind of hardware so I haven't checked into it, so forgive me if this is a stupid question with a well known answer. But, why are these not true giga class routers? David A. Greer Senior Telecomm Analyst General Nutrition Companies, Inc. 300 Sixth Avenue Pittsburgh, PA 15222 (412) 338 - 2539 (V) (412) 402 - 7000 (F) -----Original Message----- From: Greg Mirsky <gmirsky(a)nexabit.com> To: Rogerio Alvarez - DRS23 <rogerio(a)embratel.net.br>; nanog(a)merit.edu <nanog(a)merit.edu> Cc: eng-l(a)embratel.net.br <eng-l(a)embratel.net.br> Date: Thursday, October 15, 1998 10:57 AM Subject: RE: Gigarouter >Rogerio, >these are not REAL gigarouters. Real once yet to come ;). Stay tuned > > Greg > >> -----Original Message----- >> From: Rogerio Alvarez - DRS23 [SMTP:rogerio@embratel.net.br] >> Sent: Thursday, October 15, 1998 9:36 AM >> To: nanog(a)merit.edu >> Cc: eng-l(a)embratel.net.br >> Subject: Gigarouter >> >> Hi. >> >> Anyone there has any information (experience) about Gigarouters like >> GRF1600 (Ascend) or >> GSR12000 (Cisco). >> >> I want to know performance, availability, scalability and limitations >> data in "real world", >> I mean in real condition of internet traffic. >> >> Thanks in advance. >> >> Rogerio

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