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P+1DRoute Selections at PennOutbound Traffic Route Selection Modify Local Pref based on AS-Path If AS-Path is 10466:174 then set Local Pref to 50 else set Local Pref to 220 ISP Local Pref defaults to 100 Any route to a MAGPI customer or that is reachable via Abilene will be selected over ISP links. Routes to Internet sites via MAGPI s Cogent connection are only used when Penn s ISP connection is unavailable.!Z#ZMZZZ!#   b.9LRoute to MIT from Penn routerRoute to Google from PennInfluencing Inbound RoutesInbound traffic can be shifted between ISP links by prepending your ASN in your BGP route announcement to one ISP. This can artificially increase the AS-Path to your network. ISPs might edit AS-Path to remove duplicate ASNs.,4 Q&A   ` !3̙` Q.<ffff3` 3333fff` 3K=̙fff` 3fffff` ff3ff3` aNR>ff` 3fY33` 3f3f>?" dd@&?oAd(@n<)o<6=nA+7%Z', n?" dd@   @@``PR   = 7 ,`(p>> 800(  0 0 < #" `j  T Click to edit Master title style! !$ 0 0X "Pe  RClick to edit Master text styles Second level Third level Fourth level Fifth level!     S^B 0 # BCE6FGIIQU*VWX @`@$ G"  00`B 0 s *Dg "00  0 0d "^`  >*   0 0 "^   @*   0 0 "^   @*  0 dA"޽h ?Light horizontal"` 3f3f___PPT10i. "+D=' = @B + Profiler   4(  4 4 <$31 #" `p 1 T Click to edit Master title style! ! 4 051 "p`  1 W#Click to edit Master subtitle style$ $ 4 0l:1 "`` 1 >*  4 0T>1 "`  1 @*  4 0@C1 "`  1 @* ^B 4 # G1BCE6FGjIQU*VWX @`@$ G") 00 4 dA"޽h ?Light horizontal"` 3f3f___PPT10i. "+D=' = @B +} 0|$(  |r | S X14p 1 r | S ]14p`  1 H | 0޽h ? 3f3f___PPT10i.Sc`o+D=' = @B +  @J(  r  S h10j  1   XA0MAGPI-1P 1H  0޽h ? 3f3f___PPT10i.Tc>+D=' = @B +$  $(  r  S 10j  1 r  S l10Pe 1 H  0޽h ? 3f3f80___PPT10.cP   p(  r  S 10j  1   0x1PP EgMAGPI uses BGP communities to help keep track of route advertisements to Abilene, Cogent, Comcast, DCANet, and other MAGPI customers. policy-statement INBOUND-TEMPLE-COM { term term1 { from { route-filter 128.32.0.0/16 exact; route-filter 155.247.0.0/16 exact; } then { local-preference 300; community set TEMPLE-COM; accept; policy-statement OUTBOUND-FCCC-BGP { term term1 { from community [ MAGPI-INFRA-COM PENN-COM MAGPI-CUST-COM CCIU-COM ABILENE-OC12-COM LEHIGH-COM CTI-COM PRINCETON-COM TEMPLE-COM WIDENER-COM JNJ-COM DCANET-COM TJU-COM CERMUSA-COM ARCADIA-COM CHOP-COM NJEDGE-COM UDEL-COM CLIU-COM MCIU-COM MCCC-COM CAIU-COM FI-COM VILLANOVA-COM MAGPI-TIER2-COM MAGPI-PREMIUM-COM ]; then accept;  qA m  %  v     c:  s * 1"`  h  xRoutes from Temple are tagged with the community name TEMPLE-COM TEMPLE-COM is included in the advertisements to FCCC.>y 6  ,H  0޽h ? 3f3f___PPT10i.lc@OJ+D=' = @B +}  `$(  r  S x10j  1 r  S 10Pe 1 H  0޽h ? 3f3f___PPT10i.Uc~+D=' = @B +}  P$(  r  S 0j   r  S P0Pe  H  0޽h ? 3f3f___PPT10i.UcU+D=' = @B +  v(  r  S 20j   B  <$4z H18.0.0.0/8 *[BGP/170] 1d 03:20:19, localpref 220 AS path: 10466 11537 10578 3 I > to 198.32.42.249 via ge-1/0/0.0 [BGP/170] 4d 13:06:40, MED 6735, localpref 100 AS path: 209 3356 3 I > to 65.122.20.185 via ge-0/3/0.0>I 5,+  gz  0> N  The AS-Path beginning with 10466:11537 has the Local Pref set to 220 by policy. The route with the highest Local Pref is selected.H  ?,58H  0޽h ? 3f3f___PPT10i.vcPo1+D=' = @B +%  <4(  r  S ,H0j     0tIPd  64.233.160.0/23 *[BGP/170] 1w6d 19:36:40, MED 7147, localpref 100 AS path: 209 15169 I > to 65.122.20.185 via ge-0/3/0.0 [BGP/170] 6d 22:15:39, MED 3000, localpref 100, from 128.91.9.2 AS path: 174 15169 I > to 128.91.10.2 via ge-0/0/0.0 to 128.91.9.2 via ge-0/1/0.0 [BGP/170] 6d 22:15:39, MED 3000, localpref 100 AS path: 174 15169 I > to 128.91.10.2 via ge-0/0/0.0 to 128.91.9.2 via ge-0/1/0.0 [BGP/170] 1d 03:29:47, localpref 50 AS path: 10466 174 15169 I > to 198.32.42.249 via ge-1/0/0.0 0 -P7    l  0L J XWith matching Local Pref and AS-Path length, the route with the highest MED is selected.Y YAH  0޽h ? 3f3f___PPT10i.wc`+D=' = @B +}  $(  r  S ^0j   r  S _0Pe  H  0޽h ? 3f3f___PPT10i.ucz+D=' = @B +  (  x  c $Q14p 1 H  0޽h ? 3f3f80___PPT10.cpUr@ !)+:g8m0q=uJHCLA.eNOh+'0 px     (4<MAGPI Member Tech Forum Jeff EdwardsTecProfile Jeff EdwardsTec7ffMicrosoft PowerPointum@U1@@`UWSc@^ٵcGg  0  -B( --$--'--$KKXXK----%K--'@"Verdana-. *2 UMAGPI Member Tech Forum/&+"/!6#!#!#"#6."System-@"Verdana-. 02 MAGPI IPv4 Routing Overview     .-@"Verdana-. 2  Jeff Edwards    .-@"Verdana-. .2 Network Operations Manager       .-@"Verdana-. "2 jsedward@magpi.net     .-՜.+,D՜.+,8   $,4 < On-screen Show3ISC Networking and Telecom - Univ. of PennsylvaniaeYvV : VerdanaTimes New Roman WingdingsArialProfileMAGPI Member Tech ForumCurrent MAGPI ArchitectureCurrent MAGPI ArchitectureBGP CommunitiesBGP Route SelectionRoute Selections at PennRoute to MIT from Penn routerRoute to Google from PennInfluencing Inbound RoutesQ&A  Fonts UsedDesign Template Slide Titles D 4<Version$_N vJeff EdwardsJeff Edwards  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~Root EntrydO)Pictures;'Current UserSummaryInformation(PowerPoint Document(ODocumentSummaryInformation8Root EntrydO):nd@Pictures;'Current User)SummaryInformation(_NISCISC