RP/0/RP0/CPU0:R1#show route isis
Mon Sep  7 07:01:07.591 UTC

i*L1 0.0.0.0/0 [115/10] via 10.1.2.2, 00:03:03, GigabitEthernet0/0/0/0
i L1 2.2.2.2/32 [115/10] via 10.1.2.2, 00:03:03, GigabitEthernet0/0/0/0
i L1 10.2.3.0/24 [115/20] via 10.1.2.2, 00:03:03, GigabitEthernet0/0/0/0
RP/0/RP0/CPU0:R1#show route 0.0.0.0/0
Mon Sep  7 07:01:07.791 UTC

Routing entry for 0.0.0.0/0
  Known via "isis 1", distance 115, metric 10, candidate default path, type level-1
  Installed Sep  7 06:58:04.682 for 00:03:03
  Routing Descriptor Blocks
    10.1.2.2, from 2.2.2.2, via GigabitEthernet0/0/0/0
      Route metric is 10
  No advertising protos. 
RP/0/RP0/CPU0:R1#show route 4.4.4.4/32
Mon Sep  7 07:01:07.964 UTC

% Network not in table

RP/0/RP0/CPU0:R1#traceroute 4.4.4.4 source 1.1.1.1
Mon Sep  7 07:01:08.123 UTC

Type escape sequence to abort.
Tracing the route to 4.4.4.4

 1  10.1.2.2 14 msec  4 msec  5 msec 
 2  10.2.3.3 8 msec  38 msec  9 msec 
 3  10.3.4.4 14 msec  *  12 msec