hi, just to add,
We are an enterprise and we will be rolling out an MPLS solution very soon... it`s a MP-BGP VPN solution which a lot of provider`s in the UK are starting to push cheers steve ----- Original Message ----- From: "Priscilla Oppenheimer" To: Sent: Wednesday, December 04, 2002 2:21 AM Subject: Re: Enterprise technologies [7:58493] > Thanks so much dre! > > Regarding GARP, someone said I had to cover it, but didn't explain why or > even what it is. It seems to mean more than one thing: > > Generic Attribute Registration Protocol > and > Group Address Resolution Protocol > > I'm assuming they meant the second one and that the second GARP is somewhat > of a replacement for IGMP snooping and CGMP? But I'm still trying to figure > it out. > > Your comments are very helpful. > > Priscilla > > dre wrote: > > > > ""Priscilla Oppenheimer"" wrote > > > I may be starting a new project doing some writing about > > > technologies used in enterprise networks. (read not service > > > provider) > > > > > > Do I need to cover IS-IS? Or is it mainly ISPs that use this? > > > > I've never seen IS-IS in Enterprise networks, only ISP > > backbones and CODCN's (Central Office Data > > Communications Networks) that implement OSI stacks on > > network elements. The primary reason I've heard (I'm an > > IS-IS fan working in the Enterprise), that also happens to > > be a sort of compelling argument - is that OSPF and > > EIGRP work better through firewalls. I believe that IS-IS > > is significantly less complex than OSPF or EIGRP, and > > therefore, easier to train/learn, implement, manage, etc. > > > > > How about MPLS? I should discuss it briefly, but aren't > > > the main users of MPLS ISPs, not enterprise networks? > > > > I've only seen MPLS in ISP networks, but could be used > > in Enterprise, especially simple VRF concepts (from > > MPLS VPN's). I could see many reasons that Enterprises > > could use even static route VRF's for various useful purposes > > on occasion, but even that is a rarity. Of course, I'm also of > > the opinion that MPLS doesn't really belong in SP networks > > either - so YMMV. MPLS-TE is still being argued among > > the SP network guru's. MPLS FRR (Fast Re-Route) is an > > important network protection and resliency technology and > > should be researched, tested, and implemented when the > > need arises for it (including for Enterprises). > > > > > Anyone using GARP? That's on my list to research too. > > > > GARP, as in Multicast? Many Enterprises are using > > Multicast, but their use can vary depending on the > > company (could be for reliable multicast like TIBCO, or > > could be for live broadcasting sending/receiving, or > > research, or many other technical/business reasons). > > Understanding the basics is good, but it's hard to cover > > all the advanced topics in IP Multicast because it's such > > a point application as it is already. > > > > > Alas, I have a lot to learn. Thank-you VERY much > > > for answering these quick questions. > > > > You will probably want to look at this from a specific industry > > perspective, i.e.: > > > > High-Tech Manufacturing / Hardware/Software Engineering > > Pharmaceuticals > > Automotive, Consumer Goods > > Government / Political / Federal vs. State/County/City > > Defense / Military / Aerospace > > Education > > Banking / Securities / Financials / Real-Estate > > Insurance Companies > > Entertainment > > Retail > > Health Care > > Hospitality / Transportation > > Energy > > > > Certain companies have totally different needs > > technology-wise... > > in particular, some business build networks without latency in > > mind > > because they are a state-wide organization, or even a city-wide > > organization. Some companies have networks that span the globe, > > and some have the same type of need in a mission-critical way. > > There are many technologies that apply to certain companies and > > not others. > > > > For any large Enterprise that relies on IT to be > > mission-critical, > > figure that the cost of IT downtime is significant (Meta Group > > 2001 report shows $1.5M per hour of downtime). IT relies on > > the Internet for growth and technology. Data centers, > > especially > > Internet data centers are the key point to any IT > > infrastructure. > > The primary technologies in these environments are rapidly > > shifting. Many organizations are now required to, or at the > > very > > least are planning to, add more than one primary data center for > > 100%, near-instantaneous continuous operation / disaster > > recovery. You will see this in the High-Tech industry because > > of maturity, and you will see it in the Government/Defense > > industries because of things like the Homeland Security Act > > (signed November 25th, 2002). The same Meta group report > > shows that 70-75% of mid- to top-tier applications will be > > distribued across at least two data centers by 2003. I got this > > information from: > > > http://www.cisco.com/global/EMEA/networkers/presentations/NSC-284_Reiner_Dre > > sbach.pdf.gz > > > > Because of the need for distributed data centers, technologies > > such as: > > > > BGP-4 (and therefore IP address management/globalization, > > as well as Peering and Carrier-Neutral co-location) > > Content Networking (RHI, E-CDN, DNS/HTTP-routing) > > Optical Networking (DWDM, Optical Ethernet, RSTP) > > Virtual Private Networking (to include Site-to-Site VPN, > > Remote Access User VPN - both over the Internet and on > > private networks, as well as CE MPLS VPN) > > Security (I see this more as host security, then network > > security, but YMMV) > > > > will become increasingly important for Enterprises. More > > importantly, they will want to increase availability and > > performance of 3-tier applications (front-ends, application > > servers, and database servers), while also making them > > global and distributed. This will have a very serious impact > > on the networking technologies and industry best practice > > methods. > > > > Also big for Enterprises will be technologies that represent > > significant ROI with quick and easy Break-Even points, etc. > > > > i.e.: > > IP Telephony (SIP, Unified Messaging, CallManger, Unity) > > Network Management / OSS / Automation > > > > 3-Tier Applications are really big in large Enterprises, and > > there are only a few current methods of implementing them. > > IBM - pSeries (AIX/Linux) + Websphere + DB2 > > Sun - Ultra (Solaris) + BEA WebLogic + Oracle 9i > > Microsoft - HP or Dell (NT server) + .NET + MS SQL > > > > Some people do multi-vendor mix 'n match, but that is the > > general idea. What's even funnier is look at this model: > > > > Largest Enterprise (Fortune 500) -> IBM > > Other Large Enterprises -> Best Practice (Sun+BEA+ORA) > > Enterprise businesses -> Cheapest (Microsoft+Dell) > > > > The nice thing about being a Network engineer is that you are > > often stuck with Cisco (only other choices are really Juniper, > > Foundry, Extreme, Riverstone - who don't have solutions, > > only point products), but any basic Cisco network will nicely > > support any of the three most popular 3-tier application > > niches (or any variant). The network requirements don't > > change, so it's much easier to sell/implement/fund/support/etc. > > > > Do a search on CCO (logged in with a customer account) > > for "SRND" and read all those PDF's. You will see what an > > Enteprise might need today. In reality, these technologies are > > going to represent significant cost savings for Enterprises, > > however, they will have to consider that more spending will > > occur in the short-term (CAPEX often leads to lower > > future OPEX), but many businesses are especially thinking > > about long-term viability in this current economy (funny how > > things work that way). The ROI on IP Telephony alone can > > represent such significant savings, it's very logical for > > Enterprises to move to all sorts of complex networks that > > require new business units to build and support (yet that > > still manage to consistently meet break even points, etc). > > > > What is it that you are working on? > > > > - dre Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=58611&t=58493 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
