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  • 1.  protocols ospf traffic-engineering shortcuts

    Posted 11-25-2012 06:11

    what does this command mean?

     

    It will install some prefix in the inet.3 ,but what prefix will be installed in inet.3 if I enabel this command



  • 2.  RE: protocols ospf traffic-engineering shortcuts

    Posted 11-28-2012 20:59

     

    Hey Robbie,

     

     In short, this command will instruct OSPF (locally on the router) to consider any existing LSP's while computing the SFP tree.

     

     Please see here for some nice examples.

     

    Cheers,

     



  • 3.  RE: protocols ospf traffic-engineering shortcuts

    Posted 11-28-2012 21:34

    hi,

    suppose it is

    r1-r2-r3-r4-r5-r6

    there is a lsp r2-r3-r4   (ospf area 0)

     

    1:whether r1 can use this short to use this lsp to reach r6

     

    2:if I enable shortcut in r2,only prefix of link between r4 and r5 will be installed in inet.3 ,right?



  • 4.  RE: protocols ospf traffic-engineering shortcuts
    Best Answer

     
    Posted 11-30-2012 14:06

    Hi Rob,

     

    @Robbie wrote:

    hi,

    suppose it is

    r1-r2-r3-r4-r5-r6

    there is a lsp r2-r3-r4   (ospf area 0)

     

    1:whether r1 can use this short to use this lsp to reach r6

     

    2:if I enable shortcut in r2,only prefix of link between r4 and r5 will be installed in inet.3 ,right?



    [1] Yes r1 can make use of LSP between r1-r6. Traceroute from r1 to r6 with "mpls traffic-engineering" enabled on r2 to see it youself.

     

    [2] In this case with OSPF shortcuts, all prefixes beyond the end-point r4 would be mapped to LSP and by default it would be installed in inet.3. Enabling "mpls traffic-engineering bgp-igp" will make it install in inet.0

     

     

    Regards

    Surya



  • 5.  RE: protocols ospf traffic-engineering shortcuts

    Posted 12-01-2012 22:59

    [2] In this case with OSPF shortcuts, all prefixes beyond the end-point r4 would be mapped to LSP and by default it would be installed in inet.3. Enabling "mpls traffic-engineering bgp-igp" will make it install in inet.0

     

    -------------------------------these prefixes should exist in ospf area 0,right?   if there is no ospf enbaled on it,no short prefix installed in inet.3



  • 6.  RE: protocols ospf traffic-engineering shortcuts

     
    Posted 12-02-2012 11:52
    @Robbie wrote:

    [2] In this case with OSPF shortcuts, all prefixes beyond the end-point r4 would be mapped to LSP and by default it would be installed in inet.3. Enabling "mpls traffic-engineering bgp-igp" will make it install in inet.0

     

    -------------------------------these prefixes should exist in ospf area 0,right?   if there is no ospf enbaled on it,no short prefix installed in inet.3

    Yes. that's correctscorrects

     

    Regards

    Surya