12th Lecture - Networking

[k2s]

Interior IP Routing Protocols Compared

[img]http://i56.tinypic.com/11vl9ua.png[/img]

[ToughGuy]

continue

[k2s]

[img]http://i51.tinypic.com/eziquv.png[/img]

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AD:


Administrative distance is a number that denotes
how believable an entire routing protocol is on a single router. The lower the number, the better, or more believable, the routing protocol. For instance, RIP has a default
administrative distance of 120, and EIGRP defaults to 90, making EIGRP more believable
than RIP. So, when both routing protocols learn routes to the same subnet, the router adds
only the EIGRP route to the routing table.




Default Administrative Distances

Route Type Administrative Distance
Connected 0
Static 1
BGP (external routes) 20
EIGRP (internal routes) 90
IGRP 100
OSPF 110
IS-IS 115
RIP 120
EIGRP (external routes) 170
BGP (internal routes) 200
Unusable 255


NOTE The show ip route command lists each route’s administrative distance as the
first of the two numbers inside the brackets. The second number in brackets is the metric.

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the two routing protocols might learn routes to the
same subnets. When a single routing protocol learns multiple routes to the same subnet, the
metric tells it which route is best. However, when two different routing protocols learn
routes to the same subnet, because each routing protocol’s metric is based on different
information, IOS cannot compare the metrics. For instance, RIP might learn a route to
subnet 10.1.1.0 with metric 1, and EIGRP might learn a route to 10.1.1.0 with metric
2,195,416, but the EIGRP may be the better route—or it may not. There is simply no basis
for comparison between the two metrics.

[k2s]

[color=#ff0000][size=6]Any Doubts [/size][/color]

[Jatka Bandi]

[quote name='k2s' timestamp='1318887275' post='3000950']
[color=#ff0000][size=6]Any Doubts [/size][/color]
[/quote]

nuvvu mammalni eppudu vadulutavra pantulu ga....

[ToughGuy]

[quote name='bantrothu bullabbai' timestamp='1318887433' post='3000958']

nuvvu mammalni eppudu vadulutavra pantulu ga....
[/quote]

[img]http://i55.tinypic.com/sevktc.gif[/img]

[k2s]

[quote name='bantrothu bullabbai' timestamp='1318887433' post='3000958']

nuvvu mammalni eppudu vadulutavra pantulu ga....
[/quote]

ninnu evvaru vinnamannaru bullabbai

[k2s]

@all......
u can refer ICND2 exam certification guide - for further reading
[url="http://megaupload.com/?d=2L8VC5NW"]http://megaupload.com/?d=2L8VC5NW[/url]

[robo]

[quote name='k2s' timestamp='1318886337' post='3000891']
[img]http://i55.tinypic.com/29o5xcl.png[/img]



Router B’s RIP route to 10.1.1.0 points through Router A
because that route has a lower hop count (1) than the route through Router C (2). However,
in the lower half of the figure, Router B chooses the two-hop route through Router C when
using EIGRP because the bandwidths of the two links in the route are much faster (better)
than that of the single-hop route. Note that so that EIGRP would make the right choice, the
engineer correctly configured the interface bandwidth to match the actual link speeds,
thereby allowing EIGRP to choose the faster route.
[/quote]
eigrp gathers bandwidth details of all the neighboring routes so
while routing if the packet has to pass through a router which doesn't support eigrp wii again be routed to its destination adopting diff protocol
so in this process a packet is not bound to a particular protocol in its path but multiple routing protocols are used ?

[Jatka Bandi]

[quote name='k2s' timestamp='1318887662' post='3000968']

ninnu evvaru vinnamannaru bullabbai
[/quote]


naa dfost gallandarini pattukuni sollu septunte nenu evadtho adukovali.....

[k2s]

[quote name='ROBO' timestamp='1318887957' post='3000984']
eigrp gathers bandwidth details of all the neighboring routes so
while routing if the packet has to pass through a router which doesn't support eigrp wii again be routed to its destination adopting diff protocol
so in this process a packet is not bound to a particular protocol in its path but multiple routing protocols are used ?
[/quote]

question enti ?

R1-----------R2----------R3----------R4

R1, R2, R4 are running EIGRP
R3 is running RIPv2 assume.......... then R3 doesn't understand. updates coming from R2 to R3...... |||larly R4 doesn't understand R3 updates.......

To understand different protocol updates... we use Route- Redistribution.

[k2s]

[quote name='bantrothu bullabbai' timestamp='1318888003' post='3000987']


naa dfost gallandarini pattukuni sollu septunte nenu evadtho adukovali.....
[/quote]

peddollaki entha kastam ochindhi......

[robo]

[quote name='k2s' timestamp='1318888143' post='3000990']

question enti ?

R1-----------R2----------R3----------R4

R1, R2, R4 are running EIGRP
R3 is running RIPv2 assume.......... then R3 doesn't understand. updates coming from R2 to R3...... |||larly R4 doesn't understand R3 updates.......

To understand different protocol updates... we use Route- Redistribution.
[/quote]

Route- Redistribution ante