8/13/2019 Configuring Frame Relay in Multipoint Topology on Cisco

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Configuring Frame Relay in Multipoint topology on Cisco IOS.May 14, 2010reeconLeave a commentGo to comments

Configuration of Frame Relayon Cisco Systems router in multipoint topology is easy as pie and takes several minutes. My virtual la

consists of Dynamipsnet!ork simulator running onUbuntu. "ere is t#e topology !e !ill use$

%n Frame RelayMultipoint topology routers s#are one sunet. %n suc# a solution IPaddresses are saved and are not !asted like in &oint'to'

point topology. "o!ever t#ere is one dra!ack ( distance vector routing protocols suc# as )%& or *%G)& may not !ork correctly ecause of

split #ori+on rule.

Split #ori+on locks sending routing updates from t#e interface t#ey originated. #e fastest solution is to disale split #ori+on on router-s

interfaces ( #o!ever t#ere is a etter one, you can use point'to'point su'interfaces for more information, c#eck t#is

article$#ttp$//reecon.!ordpress.com/configuring'frame'relay'in'point'to'point'topology'on'cisco'ios/.

Synopsis:

#at !e are going to do is configure routers R1, R2and R!it# point'to'point su'interfaces. e !ill s!itc# inverse )& of and perform

custom %& to 3LC% mapping. e !ill also configure rame )elay s!itc# FRS!I"C#. So, let-s get t#is net!ork started5

irst, !e !ill configure rame )elay s!itc#. fter enaling s!itc#ing on router !e !ill make some routes and specify interface type to e a

3C* y default a router is considered to e a 3* device.

FR-SWITCH(config)#frame-relay switching

FR-SWITCH(config)#int s 1/FR-SWITCH(config-if)#enca!s"lation frame-relay

FR-SWITCH(config-if)#frame-relay intf-ty!e ce

FR-SWITCH(config-if)#frame-relay ro"te 1$ interface serial 1/1 $1

FR-SWITCH(config-if)#frame-relay ro"te 1% interface serial 1/$ %1

FR-SWITCH(config-if)#no sh"town

FR-SWITCH(config-if)#int serial 1/1

FR-SWITCH(config-if)#enca!s"lation frame-relay

FR-SWITCH(config-if)#frame-relay intf-ty!e ce

FR-SWITCH(config-if)#frame-relay ro"te $1 interface s1/ 1$

FR-SWITCH(config-if)#frame-relay ro"te $% interface s1/$ %$FR-SWITCH(config-if)#no sh

FR-SWITCH(config-if)#int s 1/$

FR-SWITCH(config-if)#enca!s"lation frame-relay

FR-SWITCH(config-if)#frame-relay intf-ty!e ce

FR-SWITCH(config-if)#frame-relay ro"te %1 interface s1/ 1%

FR-SWITCH(config-if)#frame-relay ro"te %% interface s1/1 $%

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8/13/2019 Configuring Frame Relay in Multipoint Topology on Cisco

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FR-SWITCH(config-if)#no sh

o e6amine and verify route statements type show frame-relay route

FR-SWITCH#show frame-relay ro"te

In!"t Intf In!"t &lci '"t!"t Intf '"t!"t &lci Stat"s

Serial1/ 1$ Serial1/1 $1 actie

Serial1/ 1% Serial1/$ %1 actie

Serial1/1 $1 Serial1/ 1$ actie

Serial1/1 $% Serial1/$ %$ actie

Serial1/$ %1 Serial1/ 1% actie

Serial1/$ %$ Serial1/1 $% actie

7o! !e #ave to configure remaining routers. Configuration on eac# router !ill e very similar ( after enaling ) encapsulation !e !ill

specify D$CIto IPaddress mapping.

Sample )2 configuration$

R$(config)#int s 1/

R$(config-if)#enca!s"lation frame-relay

R$(config-if)#no i! aR$(config-if)#no sh

R$(config)#int s 1/$ m"lti!oint

R$(config-s"*if)#i! a 111$ $++$++$++$+$

R$(config-s"*if)#frame-relay i! 1111 $1

R$(config-s"*if)#frame-relay i! 111% $%

7o!, !e can e6amine ) map f.e on )2$

R$#show frame-relay ma!

Serial1/1 ("!), i! 1111 lci $1(C.%.) static

*roacastCISC' stat"s efine actie

Serial1/1 ("!), i! 111% lci $%(C0%0) static

*roacast

CISC' stat"s efine actie

Configuration on )1 and )8 is similar. #at-s all aout rame )elay multipoint.

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