bgp—the exterior gateway routing protocol

... bảo EIGRP có module chính: + Protocol- Dependent Modules + Reliable Transport Protocol (RTP) + Neighbor Discovery/ Recovery + Diffusing Update Algorithm (DUAL) a/ Protocol- Dependent Modules EIGRP ... dành cho định tuyến EIGRP hỗ trợ authentication việc sử dụng tin mã hoá MD5 EIGRP classless routing protocol, có nghĩa gửi subnet mask thông tin định tuyến Đặc điểm cuối EIGRP không hỗ trợ IP ... động redistribution IGRP IGRP process có autonomous system b/ Reliable Transport Protocol Reliable Transport Protocol (RTP) qun lý việc phân phát packet EIGRP Reliable có nghĩa phân phát đảm...

Ngày tải lên: 12/12/2013, 17:15

... Routing Table Maintenance Protocol (RTMP) The IP implementation redistributes routes learned from OSPF, Routing Information Protocol (RIP), IS-IS, Exterior Gateway Protocol (EGP), or Border Gateway ... Interior Gateway Routing Protocol (EIGRP) q AS number of the destination q Configurable administrator tag q ID of the external protocol q Metric from the external protocol q Bit flags for default routing ... DUAL to make routing decisions, the results of which are stored in the IP routing table IP-Enhanced IGRP is responsible for redistributing routes learned by other IP routing protocols Routing Concepts...

Ngày tải lên: 18/01/2014, 05:20

... Interior Gateway Routing Protocol (EIGRP) As internetworks grew in scale and diversity in the early 1990s, new routing protocols were needed Cisco developed Enhanced Interior Gateway Routing Protocol ... Interior Gateway Routing Protocol (EIGRP) Technical Overview of EIGRP EIGRP offers many advantages over other routing protocols, including the following: • Support for VLSM—EIGRP is a classless routing ... the primary path fails Protocol- Dependent Modules EIGRP is one of the few routing protocols that can work with multiple routed protocols Cisco implements what it calls protocol- dependent modules...

Ngày tải lên: 24/01/2014, 19:20

... trường Protocol number - IGRP sử dụng khái niệm Autonomous System (AS)_AS number vùng định tuyến có chung sách định tuyến, IGRP AS IGRP process domain_tập hợp router có chung routing protocol ... Võ Trường Sơn  Exterior route : Đuờng ngoại vi đường hệ tự quản(autonomous system) Thông thường gateway router để Phần mềm Cisco IOS chọn đường số đường ngoại vi IGRP để làm gateway Router sử ... dụng đến đường gateway mạng đích mạng không kết nối trực tiếp vào router router không tìm đường khác để đến mạng đích Nếu hệ tự quản có nhiều đường ngoại vi để kết nối router chọn cho gateway khác...

Ngày tải lên: 18/03/2015, 17:52

... BGP routing information to Interior Gateway Protocols (IGPs) that run within the AS, such as Interior Gateway Routing Protocol (IGRP), Intermediate System-to-Intermediate System (IS-IS), Routing ... Configurations Summary Using the Border Gateway Protocol for Interdomain Routing The Border Gateway Protocol (BGP), defined in RFC 1771, provides loop-free interdomain routing between autonomous systems ... the Border Gateway Protocol for Interdomain Routing http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm#xtoc Router A receives updates about 160.10.0.0 from two routing protocols:...

Ngày tải lên: 16/11/2014, 19:49

... 6.3 Considerations for Routing Ideally, a link quality estimator for a routing protocol should be accurate, agile, and stable, and should add minimum overhead to the routing protocol Below, we discuss ... Section concludes the paper with the main remarks and a discussion of future work Routing Protocol The routing protocol we consider in our study is NST-AODV, an adaptation of AODV for IEEE 802.15.4 ... Quality Routing One of the first attempts at routing based on link qualities in a low-power wireless network [35] was carried out using the Destination Sequenced Distance Vector (DSDV) routing protocol...

Ngày tải lên: 21/06/2014, 11:20

... of routing, and new protocol features all contribute to making routing protocols complex to design, write and deploy effectively in networks For example, IS-IS started as a link-state routing protocol ... Network Layer protocol they called the Internet Packet Exchange (IPX) protocol and a routing protocol to properly route packets between sub-nets Novell’s first generation routing protocol was based ... configuration file are propagated to the routing processes that “speak” router-to-router protocols like OSPF or IS-IS or Border Gateway Protocol (BGP) If the same routing protocol is provisioned on both...

Ngày tải lên: 27/06/2014, 00:20

... of routing, and new protocol features all contribute to making routing protocols complex to design, write and deploy effectively in networks For example, IS-IS started as a link-state routing protocol ... Network Layer protocol they called the Internet Packet Exchange (IPX) protocol and a routing protocol to properly route packets between sub-nets Novell’s first generation routing protocol was based ... configuration file are propagated to the routing processes that “speak” router-to-router protocols like OSPF or IS-IS or Border Gateway Protocol (BGP) If the same routing protocol is provisioned on both...

Ngày tải lên: 02/07/2014, 20:21

... where a big “all protocols” routing process is partitioned into individual subprocesses Each routing protocol instance would run in a dedicated process Scheduling between the routing modules would ... the duties of the routing protocols to report that a certain sub-net is unreachable The routing protocols propagate this change and all routers along the path recompute their IP routing tables From ... to the application scheduler of the routing protocol subsystem, the kernel scheduler works as illustrated in Figure 2.9 Here the application (the routing protocol) does not need to be written...

Ngày tải lên: 02/07/2014, 20:21

... where routing policies are configured That’s no big surprise – with IOS, because of its multiprotocol nature, each routing protocol implements its own routing policy processing as part of the protocol s ... between the protocols – there is a defined “choke point” where all protocols install their routing information, which is the main unicast routing table inet.0 So for each protocol one or more routing ... information from all possible routing protocols JUNOS model is shown in Figure 3.14, where the routing entry in the central routing table holds “metainformation” about all routing protocol attributes Let’s...

Ngày tải lên: 02/07/2014, 20:21

... routing protocol passes a certain amount of routing information up the routing hierarchy, and other routing information is passed down the routing hierarchy There is a bi-directional flow of routing ... address However, this assumes a proper routing of the loopback IP address, and this requires a routing protocol like IS-IS If the problem is that routing protocol does not work or does not come ... collection of all public IP sub-nets) The default router on the LAN runs a routing protocol like IS-IS and interdomain routing protocols like BGP to learn where the destination prefix is located (actually,...

Ngày tải lên: 02/07/2014, 20:21

... the IS-IS protocol 5.1 Hello Message Encoding Each routing protocol uses Hello messages for neighbour discovery and to perform handshaking In IS-IS, just like in any other routing protocol, this ... all routing (and signalling) protocols include a method of automatic neighbour discovery that enables a router to determine if there are any other adjacent routers running the same routing protocol ... interact with these remote routers Additionally the routing protocol needs to verify if the link is two-way capable (that is, equally able to pass protocol traffic in both directions) before it can...

Ngày tải lên: 02/07/2014, 20:21

... (Internet routes and customer routes), there is the Border Gateway Protocol (BGP), the interdomain routing protocol of the Internet Each protocol does what it can best IS-IS quickly discovers, and ... link-state protocol data unit (LSP) This chapter covers these functions and the surrounding network events th at cause the IS-IS protocol to generate, flood and finally age LSPs Link-state routing protocols ... route protocol isis output we can see a subset of routes that got displayed in show isis routes Those are the routes that competed for installation in the routing table with other routing protocols...

Ngày tải lên: 02/07/2014, 20:21

... mid-1980s routing protocols are required to operate and scale on broadcast circuits like Ethernet Broadcast networks allow multiple devices to see each other For link-state routing protocols ... link-state routing protocols, the implementer needs to make an effort not to overwhelm neighbours with excessive LSP updates Excessive LSPs might churn the network In typical transport protocols ... higher-level protocol information like IP addresses The pseudonode can be seen as a protocol independent node which only carries IS-Reach and optional authentication information Arguably the notion of protocol...

Ngày tải lên: 02/07/2014, 20:21

... improvement of the routing protocol through added features and bug fixes forms the essence of the extensible routing protocol How non-extensible 284 11 TLVs and Sub-TLVs routing protocols negatively ... continued survival – of the protocols Ideally, routing protocols should be almost like good wine – the older, the better 11.1.2 Ramifications of Non-extensible Routing Protocols The allowance for ... verify the protocol and the accompanying new features are prime-time ready 11.1.3 What Does it Mean When a Routing Protocol Is Called Extensible? How can anyone tell if a routing protocol is...

Ngày tải lên: 02/07/2014, 20:21

... there was the belief that there would be a single routing protocol for routing both intra-domain routes and inter-domain routes So the routing protocols were prepared to mark routes Intra-Domain ... the IS-IS protocol In hindsight, almost always where protocol designers tried to address a particular CPU/memory/ environment shortage issue of the time by protocol properties, those protocol ... can be created using routing policies More about routing policy design philosophy and use of the passiveonly knob appears in Chapter16 12.2.2 Protocols Supported TLV #129 The Protocols Supported...

Ngày tải lên: 02/07/2014, 20:21

... to stay compatible to other routing protocols like BGP and OSPF, which also have 32-bit metrics for their routing information By picking a compatible metric size, the protocol designers made sure ... as from another routing protocol (RIP, OSPF, BGP, statics), into IS-IS as well This is particular useful when networked-technology does not speak IS-IS or not even a routing protocol, and the ... another link-state protocol, leaks routing information between OSPF areas The assumption is a bit of familiarity with OSPF, enough to appreciate the differences between the two protocols Consider...

Ngày tải lên: 02/07/2014, 20:21

... Addresses R (0) Intra-domain Routing Protocol Discriminator 0؋83 R R 1 Version /Protocol ID Extension ID Length 27 Bytes Header Length Indicator Intra-domain Routing Protocol Discriminator 0؋83 ... Authenticating Routing Information 351 13.2 Authenticating Routing Information Authenticating routing protocol messages is a basic building block for every ... The most important TLV for multi -protocol operation is the Protocols Supported TLV #129, illustrated in Figure 13.9 The Protocols Supported TLV #129 lists all the protocols Bytes Type 129 Length...

Ngày tải lên: 02/07/2014, 20:21

... “signalling” and routing paradigm found in IP networks Routing typically does not get any feedback – at best a routing protocol tells its neighbour that it has received the routing update by ... lookup on the packet inside 14.4 MPLS Signalling Protocols Now the next big question is: how are label switched paths established? As in the routing protocol world, there are generally two ways to ... link-state routing protocols enormously Chapter 6, “Generating, Flooding and Ageing LSPs”, presented more details as to the catastrophic effects such full-mesh setups have during re -routing conditions...

Ngày tải lên: 02/07/2014, 20:21

... Particularly during routing protocol migrations (for example from EIGRP to IS-IS) it may be the case that the other routing protocol is still masking the routes from the new routing protocol A modification ... label setup protocol called the Label Distribution Protocol (LDP) is used MPLS Signalling Protocols 417 14.4.3 LDP LDP is defined in RFC 3036 and it describes a lean, lightweight protocol that ... under the protocols rsvp stanza JUNOS configuration In JUNOS you need to specify the interface where you want to send bandwidth and reservation state both under the protocols mpls {} and protocols...

Ngày tải lên: 02/07/2014, 20:21