what is routing protocol in networking
The Complete IS-IS Routing Protocol potx
Ngày tải lên :
27/06/2014, 00:20
... Router, Intradomain (IS- IS)
Finally, the Intermediate to Intermediate System Intradomain Routing Exchange
Protocol (to give IS- IS its official name) was published as ISO specification ISO 10589.
First-time ... processes, as illustrated in Figure
2.17. The routing code is still bundled in a single process for all the routing protocols
across all routing instances, so the issue of scheduling is still present. ... TLVs. So it looks like IS- IS is a
routing protocol for CLNP, and the IP thing is an add-on. That is partly true, but the ability to carry
routing info for any layer 3 protocol is a well designed...
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The Complete IS-IS Routing Protocol- P1 pps
Ngày tải lên :
02/07/2014, 20:21
... running routing protocols based
on IS- IS.
1.2.6 IETF ISIS-WG
From 1999, most of the IS- IS extensions for IP are done within the IETF and not within
ITU-T or ISO committees. Most of the basic IS- IS protocol ... Motivation and Historical Background
•
Router to Router, Interdomain (IDRP)
•
Router to Router, Intradomain (IS- IS)
Finally, the Intermediate to Intermediate System Intradomain Routing Exchange
Protocol ... in networks. For example, IS- IS
started as a link-state routing protocol for ISO networks. It has since evolved signifi-
cantly: IS- IS has IPv4 and IPv6 (and IPX) addressing; IS- IS can carry information...
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The Complete IS-IS Routing Protocol- P2 pot
Ngày tải lên :
02/07/2014, 20:21
... Show the IS- IS link-state database
hostname Show IS- IS hostname database
interface Show IS- IS interface information
route Show the IS- IS routing table
spf Show information about IS- IS SPF calculations
statistics ... outgoing interface.
2.3 Routing and Forwarding Tables
Just what is the difference between a routing and a forwarding table? The short answer is
size and amount of origin information. The routing ... processes, as illustrated in Figure
2.17. The routing code is still bundled in a single process for all the routing protocols
across all routing instances, so the issue of scheduling is still present....
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The Complete IS-IS Routing Protocol- P3 pptx
Ngày tải lên :
02/07/2014, 20:21
... JUNOS,
there is not that much interaction in 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. ... implemented in IOS. That common routing paradigm
in IOS is called route-maps. We will discuss only IS- IS-specific routing policies and
route-maps, and only briefly. But this is fine. Due to the way IS- IS is ... by service
provider’s routing policies, which is as a pure topology discovery protocol, there are not
many IP routes in the IS- IS routing protocol to worry about distributing, because BGP
does...
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The Complete IS-IS Routing Protocol- P4 doc
Ngày tải lên :
02/07/2014, 20:21
... again when giving
IS- IS training classes. Most students think that running CLNP is the prerequisite for run-
ning IS- IS. This belief is reinforced if the students first learn about IS- IS on Cisco’s ... Leaking Between Levels
Every 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 ... called ES IS (End-System to
Intermediate System), a protocol that exists in parallel with IS- IS and is at the same level
in the networking stack. As far as IP routing is concerned, ES IS does not...
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The Complete IS-IS Routing Protocol- P5 potx
Ngày tải lên :
02/07/2014, 20:21
... neighbour discovery and to perform
handshaking. In IS- IS, just like in any other routing protocol, this function is performed
through the use of what IS- IS calls Intermediate System to Intermediate ... link is at
least configured to run IS- IS. This is a good start, but not the whole story of establishing
and maintaining a full IS- IS router adjacency.
The next step is to check if the underlying ... keyword isis hello-interval minimal in its interface configuration.
Depending on the isis-hello-multiplier value, IOS dispatches Hellos in frac-
tions of this value.
IOS configuration
interface...
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The Complete IS-IS Routing Protocol- P6 ppsx
Ngày tải lên :
02/07/2014, 20:21
... Protocol (BGP), the interdomain routing protocol of the Internet. Each
protocol does what it can do best. IS- IS quickly discovers, and then re-routes the internal
network. Unfortunately, IS- IS ... 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 ... Unfortunately, IS- IS is not very good in transporting a bulk amount of routing
information across the internal network. IS- IS is in good company in being unsuited for
this task with the rest...
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The Complete IS-IS Routing Protocol- P7 ppt
Ngày tải lên :
02/07/2014, 20:21
... as shown in the following:
IOS configuration
London# show running-config
[… ]
interface atm 1/2.1
ip router isis
isis mesh-group 11
interface atm 1/2.2
ip router isis
isis mesh-group 11
interface ... running-config
[… ]
router isis
isis retransmit-interval 5
[… ]
In Cisco IOS, you can also control how fast LSPs are sent once a router is in the
retransmission window. This is another mechanism that helps ... router
ã
Retransmissions on a interface
Each of these is discussed in the following sections.
6.6.1 LSP-transmit-interval
The LSP transmit interval is one form of pacing that was originally mentioned in ISO
10589....
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The Complete IS-IS Routing Protocol- P10 docx
Ngày tải lên :
02/07/2014, 20:21
... with: this mostly depends on network size and link stabil-
ity. Network engineers used to say In a quiet environment, OSPF and IS- IS are quiet
protocols”.
In the infancy of link-state routing protocols ... active in networking as anywhere else in
life. When Darwin is translated to the routing protocols environment this means that not
the strongest, most lightweight or most optimal routing protocol, ... Option.
What this section basically does is try to pose some hypothetical questions of the routing
protocol. For instance, we could ask, in what parts or fields of the routing protocol could
Analysis...
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The Complete IS-IS Routing Protocol- P11 docx
Ngày tải lên :
02/07/2014, 20:21
... 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 for internal routes from Inter-Domain ... stability of the IS- IS code.
Adapting in a constantly changing environment is what Darwin’s Law is all about.
When it comes to routing protocols, extensibility is a prerequisite for routing protocol
evolution. ... Administrative Tag 1 draft-ietf-isis-admin-tags-01
64-Bit Administrative Tag 2 draft-ietf-isis-admin-tags-01
Management Prefix Color 117 draft-ietf-isis-wg-multi-topology-07
routes in the main routing...
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The Complete IS-IS Routing Protocol- P12 pps
Ngày tải lên :
02/07/2014, 20:21
...
interface.
JUNOS configuration
In JUNOS all IS- IS related information is located under the protocols isis configura-
tion branch. The routing metrics are properties of a given logical IS- IS interface.
hannes@New-York> ... the routing metrics according to that line speed, depending on what
kind of circuit type it is, are shown. If it is an intercontinental (expensive) link a very high
320 12. IP Reachability Information
... TLVs in Level 1. RFC
2966 loosens that restriction as well and allows injecting external information, such as
from another routing protocol (RIP, OSPF, BGP, statics), into IS- IS as well. This is...
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The Complete IS-IS Routing Protocol- P13 doc
Ngày tải lên :
02/07/2014, 20:21
... 172.16.34.5 255.255.255.252
ip router isis
isis authentication mode md5
isis authentication key-chain MY-INTF-PASSWD
isis network point-to-point
!
!
router isis
net 49.0300.1921.6800.3003.00
[… ... mismatch.
Madrid#debug isis authentication information
IS- IS authentication information debugging is on
snail#
Nov 5 00:48:01.011: ISIS-AuthInfo: Packet failed the md5 check, 77 bytes, type 17
Authenticating Routing ... sent.
Madrid#debug isis authentication information
IS- IS authentication information debugging is on
Madrid#
Nov 5 00:48:07.233: ISIS-AuthInfo: IIH no change, use the same hmac value
Nov 5 00:48:16.781: ISIS-AuthInfo:...
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The Complete IS-IS Routing Protocol- P14 pdf
Ngày tải lên :
02/07/2014, 20:21
... avoid routing loops during a network rollout.
However, if there is mis-configuration then it is relatively easy to break a multi protocol
environment in IS- IS. For that purpose, the IS- IS WG defined ... so on.
In this chapter the original motivations and problems for Internet traffic engineering,
the limits of IGP metric balancing the rise of MPLS and the role that IS- IS plays in the
distributed ... highlighted. In addition, this chapter covers
more advanced topics like DiffServ traffic engineering and forwarding adjacencies.
14.1 Traffic Engineering by IGP Metric Tweaking
In the IP world, routing protocols...
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The Complete IS-IS Routing Protocol- P15 ppt
Ngày tải lên :
02/07/2014, 20:21
... available.
MPLS Signalling Protocols 421
10 IS- IS
LDP
4 IS- IS
LDP
12 IS- IS
4 IS- IS
LDP
4 IS- IS
LDP
Frankfurt
London
Washington NewYork
Paris
4 IS- IS
LDP
FIGURE 14.15. If the IS- IS and LDP topology is non-congruent ... re-advertise the TE tunnel into IS-
IS using the tunnel mpls traffic-eng forwarding-adjacency statement.
Additionally the resulting IS- IS metric needs to be specified using the regular isis
metric ... does it
using Router-IDs (32-bit). By issuing a TLV #134 the IS- IS speaker tells other routers
what would be the corresponding OSPF router-ID in case one router is running both
OSPF and IS- IS for...
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The Complete IS-IS Routing Protocol- P16 pps
Ngày tải lên :
02/07/2014, 20:21
... authenticated.
London#debug isis authentication information
IS- IS authentication information debugging is on
London#debug isis adj-packets
IS- IS Adjacency related packets debugging is on
*Nov 22 01:19:34: ISIS-Adj: ... use
shortly to examine JUNOS and IOS are in the areas of:
ã
Displaying the IS- IS related interface properties
ã
Displaying the adjacency table
ã
Displaying the link-state database
ã
Displaying the results ... verifying if a route is present in the main routing tables is the show
route command. It displays both the IPv4 Unicast Routing Table (inet.0) as well as the
IPv6 Unicast Routing Table (inet6.0).
JUNOS...
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