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Cisco Bug: CSCtd07834 - MDT SAFI not advertised after RPR+ switchover

Last Modified

Jan 30, 2017

Products (1)

  • Cisco IOS

Known Affected Releases

12.2(33)SB6a

Description (partial)

Symptoms: The mVPN traffic is not forwarded after RPR+ switchover. Router 
stops sending its loopback prefix as MDT SAFI after RPR+ switchover.

WORKING STATE::
UUT#sh bgp ipv4 mdt all
BGP table version is 4, local router ID is 192.168.242.150
   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 666:666 (default for vrf mvpn1)
*>i192.168.242.148/32
                    192.168.242.148          0    100      0 ?
*> 192.168.242.150/32
                    0.0.0.0                                0 ?

BROKEN STATE (after RPR+)::
UUT#sh bgp ipv4 mdt all
BGP table version is 12, local router ID is 192.168.242.150
   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 666:666 (default for vrf mvpn1)
*>i192.168.242.148/32
                    192.168.242.148          0    100      0 ?

Note that UUT's peering loopback (192.168.242.150) is not imported as local 
prefix into BGP as MDT SAFI. Because of this we do not advertise it and UUT  
cannot act as receiver in mVPN.

Conditions: This symptom is seen in BGP session with MDT address family.
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