Post on 13-Feb-2018
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 $latfor" and I7.
tandard ATM/IMA !onfiguration for ,is!o
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5. ATM"#MA cnfig,atin fndaentals
and cands
alid !onfiguration for ,is!o
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5. ATM"#MA cnfig,atin fndaentals
and cands
,onfiguration of interfa!es and !ontrollers:
!
controller T1 0/0/0
mode atm aim 0
framing esf
linecode b8zs
!
interface ATM0/0/0
no ip address
no scrambling-payload
ima-grop 0
no atm ilmi-keepalie
On a 2821 router, there are 2 AIM
slots, slot 0 and slot 1. Be sure to
designate the right one here!
IMA group selected determines the IMA interface's
number (ima-group 0 goes with ATM0/IMA0, ima-group1 goes with ATM0/IMA1).
Set the T1 parameters to match the
incoming T1 - Framing, Linecode & Cable
length.
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5. ATM"#MA cnfig,atin fndaentals
and cands
nfig,atin f #MA inte,face and sbinte,face$!
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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