[nsp] MROUTE-4-RPF_LOOKUP_LOOP

[James Edwards]

Any pointers here would be appreciated. a.b.6.18 is our Stratum 1
NTP server, for the most part all gear uses mcast to hear the 
time, throughout the state. This router just got turned up and I see
these errors from time to time. Can't catch it looping doing mtraces.

I have worked the path , from xxxcolo-router3 to a.b.6.18 & it is all 
connected routes, carried by EIGRP. From a.b.5.18 back to
xxxcolo-router3, it is default routed at a.b.0.89 & a.b.0.6 then
connected routes via EIGRP take over.  

May  5 11:48:55.206 MDT: %MROUTE-4-RPF_LOOKUP_LOOP: RPF route lookup
loop for a.b.5.18, route a.b.6.0/24
May  6 14:34:32.341 MDT: %MROUTE-4-RPF_LOOKUP_LOOP: RPF route lookup
loop for a.b.5.18, route a.b.6.0/24

xxxcolo-router3>mtrace a.b.6.18 224.0.1.1
Type escape sequence to abort.
Mtrace from a.b.6.18 to a.b.0.4 via group 224.0.1.1
From source (?) to destination (?)
Querying full reverse path...
 0  a.b.0.4
-1  a.b.0.4 PIM  [a.b.6.0/24]
-2  a.b.0.2 PIM  [a.b.6.0/24]
-3  a.b.0.109 PIM  [a.b.6.0/24]
-4  a.b.0.16 PIM  [a.b.6.0/24]
-5  a.b.0.6 PIM  [a.b.6.0/24]
-6  a.b.0.89 PIM  [a.b.6.0/24]

Above is new edge2 -> new core -> old edge ->
old core -> remote city colo -> remote city office.

All edge and core routers are defaultless.

Otherwise mcast works, all three NTP sources
are mcast in different locations:

xxxcolo-router3>sho ntp associations
 
address         ref clock   st  when  poll reach  delay  offset    disp
* a.b.63.3        a.b.5.18    2    64    64  366     1.2  -123.7    56.6
+ a.b.46.21       a.b.5.18    2    25    64  376     1.4  -188.1   131.3
  a.b.6.18       .CDMA.      1    28    64  377     7.1   10.29     3.5
* master(synced),# master(unsynced),+ selected,- candidate,~ configured


-- 
James H. Edwards
Routing and Security
At the Santa Fe Office: Internet at Cyber Mesa  
jamesh at cybermesa.com
noc at cybermesa.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : https://puck.nether.net/pipermail/cisco-nsp/attachments/20040506/e916f64c/attachment.bin