Routing loops

• See CiscoMPLS for MPLS and OSPF backdoor issues including Sham-link.

• Due to redistribbution.
• Senario
  • Two autonomous systems, connected with dual links, redistributing routes.
  • Router through R1 learned from R2.

http://hackingcisco.blogspot.com/2011/02/lab-11-ospf-filtering-with-area-range.html

• OSPF notes http://bradhedlund.com/notes/ospf/

• OSPF dual distribution example http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080531fd2.shtml#singlered

• OSPF - EIGRP route tag and filter http://shawnmoorecisco.blogspot.com/2010/06/preventing-redistributed-routing-loops.html

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CategoryCisco