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Masaki Hirabaru masaki@nict.go.jp NICT

Measuring Service Disruption over Failures with Redundant Path. APAN-JP NOC Meeting April 28, 2005. Masaki Hirabaru masaki@nict.go.jp NICT. APII Fukuoka-Tokyo Configuration over JGN II. iBGP 203.181.248.206 (lo). apii-juniper. 203.181.248.118. 203.181.248.226. Northern Route (1G).

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Masaki Hirabaru masaki@nict.go.jp NICT

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  1. Measuring Service Disruption over Failureswith Redundant Path APAN-JP NOC MeetingApril 28, 2005 Masaki Hirabaru masaki@nict.go.jpNICT

  2. APII Fukuoka-Tokyo Configuration over JGN II iBGP 203.181.248.206 (lo) apii-juniper 203.181.248.118 203.181.248.226 Northern Route (1G) Kanazawa OSPF metric 90 Fukuoka ID 1157 4/22 x 5/16,18 4/26 203.181.248.117 x x ID 1036 tpr4 Okayama Osaka 203.181.248.225 Tokyo Southern Route (10G) OSPF metric 9 iBGP 203.181.248.171 (lo)(route reflector) iBGP next-hop resolution is done by OSPF(i.e. all eBGP peering addresses are in OSPF) Example at apii-juniper: BGP 129.79.0.0/16 next-hop 192.203.116.145 OSPF 192.203.116.144/30 next-hop 203.181.248.225

  3. Detecting switchover period 810 packets / sec = 10 Mbps (MTU 1500B UDP) ~ 1ms resolution 2005-04-22 Tokyo -> FukuokaNorthern Route Tokyo -> FukuokaSouthern Route Fukuoka -> Tokyo: time 2005/04/22 02:07:46-02:08:23 JST gap 37.1s loss 30264time 2005/04/22 04:02:38-04:03:15 JST gap 36.8s loss 29975time 2005/04/26 08:43:14-08:46:27 JST gap 193.1s loss 157195 time 2005/04/26 08:46:34-08:47:04 JST gap 30.3s loss 24691 Tokyo->Fukuoka:time 2005/04/22 02:07:46-02:22:51 JST gap 904.4s loss 736036time 2005/04/22 04:02:38-04:16:41 JST gap 843.5s loss 686474 time 2005/04/26 08:43:14-08:47:01 JST gap 227.6s loss 185244

  4. OSPF hello intervals Default: hello interval 10 secs dead interval 40 secs Proposal: hello interval 1 sec dead interval 4 secs OSPF adjacency will be lost while parameters are inconsistent among peers. Another way would be using BFD available JUNOS 7.X Next step with JGN II and TransPAC2 circuits BGP default hold-time 90 seconds minimum is 6 seconds (in JUNOS) route injection into tpr4 and tpr5 need a host in US side tpr4 x tpr5 US Tokyo

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