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Outgoing route running circles?
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Outgoing route running circles?

OhJohnOhJohn Member

No idea what is going on here but doing an mtr from singapore to europe i see this circular circle (and by that, packets never reaching the dest):

core.rc.sg.hostuniversal.com.au                                                    0.0%    51    0.2   0.3   0.2   1.1   0.1
 3. core.sg3.sg.hostuniversal.com.au                                                   0.0%    51    1.1   1.1   1.0   1.2   0.0
 4. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    1.2   1.2   1.0   1.6   0.1
 5. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    1.9   1.9   1.7   2.0   0.0
 6. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    1.7   1.9   1.7   2.0   0.1
 7. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    2.4   2.6   2.4   2.7   0.1
 8. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    2.6   2.7   2.4   4.2   0.4
 9. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    3.3   3.3   3.1   3.4   0.1
10. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    3.3   3.3   3.2   3.4   0.1
11. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    4.1   4.1   3.9   4.2   0.1
12. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    4.1   4.1   3.9   4.6   0.1
13. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    4.8   4.8   4.6   4.9   0.1
14. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    4.8   4.8   4.6   5.3   0.1
15. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    5.7   5.6   5.4   5.7   0.15.4  10.1   0.7
17. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    6.3   6.3   6.1   6.4   0.1
18. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    6.3   6.3   6.1   7.0   0.1
19. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    7.0   7.0   6.8   7.2   0.1
20. core.rc.sg.hostuniversal.com.au                                                    0.0%    50    7.0   7.0   6.8   7.2   0.1
21. core.sg3.sg.hostuniversal.com.au                                                   0.0%    50    7.6   7.8   7.6   7.9   0.1

etc. pp.

This does not look the way it is supposed to be.

This seems to affect only a small range of an asn that I try to reach as destination, other ranges in that destination asn are reachable normally.

Comments

  • AndreiPerjuAndreiPerju Member, Host Rep

    Talk with your ISP or who configured your BGP in routers. This is a loop of a missconfigured BGP session.

  • Yea, will do. Never saw that kind of a problem before.

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