<div style="font-size: 14px;"><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Hello~!</div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br style="box-sizing: initial; text-decoration-skip-ink: none;"></div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; font-size: 13px;">i'm using bird 2.0.10 ,1.6.3. </span><br><span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; font-size: 13px;">both of them have same problem.</span></div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">After restarting bird.service, <span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; background-color: initial; font-family: -apple-system, BlinkMacSystemFont, "Malgun Gothic", Meiryo, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; letter-spacing: -0.3px;">Routing has been normalized. </span></div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; background-color: initial; font-family: -apple-system, BlinkMacSystemFont, "Malgun Gothic", Meiryo, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; letter-spacing: -0.3px;">Because of this, I don't think I can find the phenomenon in the command you mentioned (route all)</span></div><div style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">when i checked "route all" in a trouble, there was only same value shown below </div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Detailed setting values may be problematic, so we will replace them with *.</div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; background-color: initial; font-family: -apple-system, BlinkMacSystemFont, "Malgun Gothic", Meiryo, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; letter-spacing: -0.3px;"><br></span></div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; background-color: initial; font-family: -apple-system, BlinkMacSystemFont, "Malgun Gothic", Meiryo, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; letter-spacing: -0.3px;"><br></span></div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">------------- route all ----------------</div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; font-size: 13px;">BIRD 2.0.10 ready.<br style="box-sizing: initial; text-decoration-skip-ink: none;">Table master4:<br style="box-sizing: initial; text-decoration-skip-ink: none;">10.171.0.0/24 unicast [as1 2024-05-27] * (100) [********]<br style="box-sizing: initial; text-decoration-skip-ink: none;"> via 10.171.0.25 on p0<br style="box-sizing: initial; text-decoration-skip-ink: none;"> Type: BGP univ<br style="box-sizing: initial; text-decoration-skip-ink: none;"> BGP.origin: IGP<br style="box-sizing: initial; text-decoration-skip-ink: none;"> BGP.as_path: 65200<br style="box-sizing: initial; text-decoration-skip-ink: none;"> BGP.next_hop: 10.171.51.1<br style="box-sizing: initial; text-decoration-skip-ink: none;"> BGP.local_pref: 100<br style="box-sizing: initial; text-decoration-skip-ink: none;"> unicast [as2 2024-05-27] (100) [********]<br style="box-sizing: initial; text-decoration-skip-ink: none;"> via 10.171.1.25 on p1<br style="box-sizing: initial; text-decoration-skip-ink: none;"> Type: BGP univ</span></div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; line-height: 1.5; font-size: 13px;"> BGP.origin: IGP<br style="box-sizing: initial; text-decoration-skip-ink: none;"> BGP.as_path: 65200<br style="box-sizing: initial; text-decoration-skip-ink: none;"> BGP.next_hop: 10.171.151.1<br style="box-sizing: initial; text-decoration-skip-ink: none;"> BGP.local_pref: 50<br style="box-sizing: initial; text-decoration-skip-ink: none;"></span></div><div style="font-family: system-ui; box-sizing: initial; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; text-decoration-skip-ink: none; display: block; unicode-bidi: embed; line-height: 1.5; color: rgb(0, 0, 0); font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: -0.3px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br></div><div data-nodeid="6" style="font-family: system-ui;">------------ config -------------------</div><div data-nodeid="6" style="font-family: system-ui;">log "/var/log/bird/bird.log" all;<br>debug protocols all;<br><br><br>protocol kernel {<br> persist;<br> scan time *;<br> merge paths on;<br> ipv4 {<br> import none;<br> export all;<br> };<br>}<br><br>protocol bgp as1 {<br> ipv4 {<br> import all;<br> export all;<br> };<br> local *.*.*.* as *;<br> neighbor *.*.*.* as *;<br> direct;<br> enable route refresh off;<br> hold time *;<br> error wait time *,*;<br> capabilities on;<br> allow bgp_local_pref;<br> advertise hostname on;<br>}<br><br>protocol bgp as2 {<br> ipv4 {<br> import all;<br> export all;<br> };<br> local *.*.*.* as *;<br> neighbor *.*.*.* as *;<br> direct;<br> enable route refresh off;<br> hold time *;<br> error wait time *,*;<br> capabilities on;<br> allow bgp_local_pref;<br> advertise hostname on;<br>}</div><div data-nodeid="6" style="font-family: system-ui;"><br></div><div data-nodeid="6" style="font-family: system-ui;"><br></div><p data-nodeid="7" style="font-family: system-ui;">-----Original Message-----<br>From: "Maria Matejka" <a data-nodeid="93" href="mailto:maria.matejka@nic.cz" target="_blank">maria.matejka@nic.cz</a><br>To: "이재용" <a data-nodeid="101" href="mailto:jaeyong.lee@nhn.com" target="_blank">jaeyong.lee@nhn.com</a>;<br>Cc: <a data-nodeid="106" href="mailto:bird-users@network.cz" target="_blank">bird-users@network.cz</a>;<br>Sent: 2024-06-09 (일) 20:18:22 (UTC+09:00)<br>Subject: Re: [Routing Issue] There are two same net range routing on routing table.</p><p data-nodeid="8" style="font-family: system-ui;">Hello!</p><p data-nodeid="9" style="font-family: system-ui;">Which version of BIRD and Linux kernel are you running? Could you please share your configuration file and dump of show route all?</p><p data-nodeid="10" style="font-family: system-ui;">Thanks,</p><p data-nodeid="11" style="font-family: system-ui;">Maria</p><p data-nodeid="12" style="font-family: system-ui;">On Mon, Jun 03, 2024 at 10:31:25AM +0900, 이재용 wrote: > Hello, > > We use BIRD for communication with servers with higher-level switches. > > But recently we came across the following case: > server run as a ecmp routing. > 10.171.0.0/24 proto bird > nexthop via 10.171.0.25 dev p0 weight 1 > nexthop via 10.171.1.25 dev p1 weight 1 > For a change higher-level switches, we adjusted our ibgp LP value to flow traffic as a one path. As we expected, servers routing are changed as one path routing > 10.171.0.0/24 proto bird > but, one server has a two same net range routing. like this sample > case1) > 10.171.0.0/24 proto bird10.171.0.0/24 proto bird metric 32 > nexthop via 10.171.0.25 dev ${interface1} > nexthop via 10.171.1.25 dev ${interface2} > case2 ) > 10.171.0.0/24 proto bird metric 3210.171.0.0/24 proto bird > nexthop via 10.171.0.25 dev ${interface1} > nexthop via 10.171.1.25 dev ${interface2} > in case1, there was any problem , but in case 2 it had. (flow packet as two paths)in my thought, pervious routing not deleted. So, two same range is now avaliable.if there are someone who have same problem, would you advise for this problem? ></p><p data-nodeid="13" style="font-family: system-ui;">– Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.</p></div><!--[if mso]>
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