ATM and ATM IMA

7/23/2019 ATM and ATM IMA

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ATM and ATM/IMA

Presenter: Lubos Zelinsky


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ATM and ATM/IMA

Agenda:

Define ATM

Define ATM/IMA.

Why ATM/IMA Most !o""only used e#ui$"ent.

ATM/IMA !onfiguration funda"entals and !o""ands.

ATM !onfiguration funda"entals for T%/&%

ATM traffi! sha$ing.

Troubleshooting.

'uestions.


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1. Define ATM

ATM !on!e$t:

Fixed cell length (53 bytes)

Switch based

End-t-end cnnectin

ATM header stru!ture () * bytes+


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Define ATM

ATM layers:

%. ATM Physi!al layer

Trans"ission ,on-ergen!e ub*layer

Physi!al Media De$endant ub*layer

. ATM layer

0. ATM ada$tation layer (AAL+ AAL%: used for !ir!uit e"ulation1 -oi!e o-er ATM.

AAL: used for sub*rated -oi!e o-er ATM.

AAL0/2: used for data o-er noisy ATM lines.

AAL): used for data o-er ATM1 "ost 3idely used AAL ty$e.


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!.Define ATM"#MA

#MA$4 stands for In-erse Multi$le5ing for ATM. This te!hnology

$ro-ides a s!alable and !ost*effe!ti-e solution for !usto"ers seekingto e5$and WA6 band3idth fro" T% s$eeds1 3ithout ha-ing to $ay forD0 or 7,0 !ir!uits. With IMA1 t3o or "ore T% !ir!uits !an be8bundled8 to effe!ti-ely gain u$3ard of 0Mb$s s$eeds. 9


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3. %hy ATM"#MA&

%. (Managed ATM+ MATM IMA !usto"er has greaterfle5ibility in $ur!hasing ATM a!!ess and ser-i!e $orts.

. ;efore IMA1 !usto"ers 3ere li"ited to only threesu$$orted ATM $ort s$eeds. (%.)Mb (T%+1 2)Mb (T0+1 or%))Mb (7,0+.

0. ATM/IMA is able to su$$ort u$ to < T%s (%Meg $ort s$eed+

2. T%=s "ay be dyna"i!ally added or dro$$ed fro" an IMAgrou$


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'. Mst cnly sed e*i+ent

F, !!nM and ab/e "ostly used 55 eries

0e*i,es ha,dwa,e s++,t ATM/IMA is $la!ed inside the bo5 on the "ain board

a,ds and netw,2 dles "ost !o""only used in M? !onditions is WI,*MBT*T%/&%

(ATM/IMA+1 ,is!o C and higher series is needed $ort ada$ter

"ost !o""only used in M? !onditions is 6M*%A*T0 (ATM+

#S de+ends n +latf, f, 11.! (13)

Bor IPB?/AP6 (MPL+ "ost often used %.2.ETC or ne3er %.2.%)T5 Mstly sed ables

ATM/IMA straight trough ,AT ) !able1 ?F2)*?F2) (I&*E>0*(555++

ATM D0 !able 3ith dual ;6, !onne!tors (I&*


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5. ATM"#MA cnfig,atin fndaentals

and cands

ATM/IMA !onfiguration de$ends on $latfor" and I7.

tandard ATM/IMA !onfiguration for ,is!o


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and cands

alid !onfiguration for ,is!o


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and cands

,onfiguration of interfa!es and !ontrollers:

!

controller T1 0/0/0

mode atm aim 0

framing esf

linecode b8zs

!

interface ATM0/0/0

no ip address

no scrambling-payload

ima-grop 0

no atm ilmi-keepalie

On a 2821 router, there are 2 AIM

slots, slot 0 and slot 1. Be sure to

designate the right one here!

IMA group selected determines the IMA interface's

number (ima-group 0 goes with ATM0/IMA0, ima-group1 goes with ATM0/IMA1).

Set the T1 parameters to match the

incoming T1 - Framing, Linecode & Cable

length.


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and cands

nfig,atin f #MA inte,face and sbinte,face$!

interface ATM0/"MA0

no ip address

ip rote-cac#e flow

load-interal $0no atm ilmi-keepalie

atm c-per-p 102%

!

interface ATM0/"MA0&''' point-to-point

ip address (&(&(&( 2))&2))&2))&2)2ip mt 1)00

pc "*+, 1/'''

br-nrt %08 %$'' $2

encapslation aal)snap

Regardless of controller location, always

use ATM0 (i.e. ATM0/IMAx) for the IMA

interface (that's where the AIM card is

located).

Specification of vc-per-vp parameter to

allow you to configure VCI number higher

thatn 512

VPI and VCI value needs to

be same as is configured at

first ATM device in a cloud.


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ATM cnfig,atin fndaentals f, T1"E1

!ard ty$e e% G

!ontroller &% //

"ode at" ai"

G

interfa!e ATM//

"tu %)

no i$ address

s!ra"bling*$ayload

no at" il"i*kee$ali-e

G

interfa!e ATM//..%E


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ATM cnfig,atin fndaentals f, T3"E3

card type T3 1

G

interfa!e ATM%/

band3idth 2)

at" !lo!k I6T&?6AL

at" s!ra"bling !ell*$ayload

no at" il"i*kee$ali-eG

interfa!e ATM%/. %

oa"*$-! "anage

en!a$sulation aal)sna$

G

Command is required only with NM-1A-

T3/E3.


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. ATM t,affic sha+ing.

ATM t F,ae 0elay t,affic-sha+ing

Me!hanis" ho3 to a-oid !ongestion in a net3ork.

Without it1 you !an !reate a "is"at!hed link.

7$erates inde$endently for ea!h -irtual !ir!uit.

6or"ally1 only re#uired for the high*s$eed end of the!onne!tion

Default is -alue P,?($eak !ell rate+HPorts$eed ($eak !ellrate+


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. ATM t,affic sha+ing te,inlgy$

4a,iable bit ,ate-nn,eal tie (40-60T) c+sitin$

7ea2 cell ,ate (70) - This is the "a5i"u" rate for anATM ,. It is defined in kb$s on a router and in !ells $erse!ond on "any ATM WA6 s3it!hes.

Sstained cell ,ate (S0) - 7-erall1 this is the a-erage !ellrate for an ATM ,. It is defined in kb$s on a router and in

!ells $er se!ond on "any ATM WA6 s3it!hes.

Maxi b,st si8e (MS) - This is the "a5i"u" a"ountof data that !an be trans"itted at the $eak !ell rate. It isdefined in nu"ber of !ells.

erifi!ationshow atm pvc (vpi/vci)

ATM1/1/0.300: !": #3$ %&: 3$ !&: 103 *eak,ate. %%20Aerage ,ate. 0 rst ells. 0


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. ATM t,affic sha+ing

%. Jo3 to set sha$ing for Bra"e ?elay to ATMer-i!e Inter3orking

&nter'ace ATM/.***

pvc /

v+r-nrt *, 3, M3

Ty+ical ATM t f,ae

P,? H re"ote $ort K )0/2< 4common practice is 51067

,? H re"ote $ort K )0/2< 4common practice is 51067

M; H % (doesn=t really "atter 3hen P,?H,?+


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9. asic t,bleshting.

show atm vc detail pre'i, inter'ace inclde !rc use this!o""and to -erify 3hi!h -! is in!re"enting errors

how controller (t1/e1) (slot/port) indi!ates $hysi!al

layer issues

how atm inter'ace atm(slot/port) use to !he!ks!ra"bling1 ATM layer1 !lo!king and "a5i"u" datagra"sie


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9. asic t,bleshting.

ATM/&MA veri'ication:

how ima int atm0/ima0 this !o""and gi-es you the status ofIMA grou$ and status of ea!h indi-idual T%/&%.

how atm pvc name2 - in!ludes infor"ation regarding P,status you !an find here also 7AM status.

how atm vc - This !o""and de$i!ts an a!!urate P, state for$oint*to*$oint subinterfa!es using 7AM "anage"ent. Multi$ointsubinterfa!es 3ithout at least one a!ti-e P, and $oint*to*$oint

subinterfa!es 3ithout 7AM "anage"ent 3ill al3ays sho3 a P,state of P.


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:estins&&&&&


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ATM and ATM IMA

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