[FROG] staticd blackhole recursive not allowing more specific routes to work

Patrick Boutilier boutilpj at ednet.ns.ca
Sat Jun 22 21:32:21 EDT 2019


FRR 7.1
CentOS 7.6.1810

With this in staticd.conf

ip route 10.1.0.0/16 Null0


everything in 10.1.0.0/16 gets blackholed even if there is a more 
specific route. Is this normal behaviour? If so, is there a way to turn 
off recursive?


In vtysh:


# show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
        O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
        T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
        F - PBR, f - OpenFabric,
        > - selected route, * - FIB route, q - queued route, r - 
rejected route

S>* 10.1.0.0/16 [1/0] unreachable (blackhole), 00:07:41
S>  10.1.1.0/24 [1/0] via 10.1.2.1 (recursive), 00:07:41
   *                     unreachable, 00:07:41
C>* 10.1.2.0/24 is directly connected, eth0, 00:06:59



 From bash:

# ip r s|grep hole
blackhole 10.1.0.0/16 proto 196 metric 20
blackhole 10.1.1.0/24 proto 196 metric 20




More information about the frog mailing list