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authorToshiki Tsuboi <t.tsubo2000@gmail.com>2014-11-16 10:39:42 +0900
committerFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2014-11-18 07:27:52 +0900
commitecc57e8660682b954b7683170521b1d1628255a3 (patch)
tree5fd6449b41c55784aa3ffdb153150498d83635f7 /LICENSE
parent8daa12a625b8514f7a11369d41f5d7aef2943b9e (diff)
bgp: bug fix of Multi Exit Discriminator (MED)
RyuBGP doesn't work well regarding the advertisement of BGP MED Attribute as follows. (1) In spite of receiving BGP MED:"500" from iBGP(R2), RyuBGP can't advertise BGP MED:"100" to eBGP(R3). R1 -------------> R2 -------------> RyuBGP -------------> R3 eBGP(MED:500) iBGP(MED:500) ^ eBGP(MED:500) (MED:100) (2) When RyuBGP has received BGP MED:"200" from eBGP(R3), RyuBGP has sended BGP with missing-MED to iBGP(R2). As result, PolicyBaseRouting in R2(other RyuBGP) doesn't work properly becase of selecting wrong BestPath. eBGP(MED:100) R1 ------------------------------------>+ | R3 -------------> RyuBGP -------------> R2(RyuBGP) => Wrong result [BestPath is "R3-R2"] eBGP(MED:200) iBGP(MED:N/A) Signed-off-by: Toshiki Tsuboi <t.tsubo2000@gmail.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
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