EIGRP - network advertise with wildcardΒΆ

TOPOLOGY

images/eigrp.png
  • Make a loopback interface
R5#conf
R5(config)#int lo99
R5(config-if)#ip add 15.15.0.1 255.255.255.255
  • Network advertise with no wildcard
R5#conf
R5(config)#router eigrp 100
R5(config-router)#network 15.15.15.5
R5(config-router)#no auto-summary
  • if we dont use wildcard mask
  show run | s eigrp 100
          !
  !
  router eigrp 100
   network 15.0.0.0
  !

  R1#sh ip ro 15.15.0.1
  Routing entry for 15.15.0.1/32
   Known via "eigrp 100", distance 90, metric 156160, type internal
   Redistributing via eigrp 100
   Last update from 15.15.15.5 on FastEthernet4/0, 00:00:03 ago
   Routing Descriptor Blocks:
   * 15.15.15.5, from 15.15.15.5, 00:00:03 ago, via FastEthernet4/0
Route metric is 156160, traffic share count is 1
Total delay is 5100 microseconds, minimum bandwidth is 100000 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1

  R1#ping 15.15.0.1
  Type escape sequence to abort.
  Sending 5, 100-byte ICMP Echos to 15.15.0.1, timeout is 2 seconds:
  !!!!!
  Success rate is 100 percent (5/5), round-trip min/avg/max = 28/45/52 ms
  • Use wildcard
R5#conf
R5(config)#router eigrp 100
R5(config-router)#network 15.15.15.5 0.0.0.0

R1#ping 15.15.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 15.15.0.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

R1#sh ip ro 15.15.0.1
% Subnet not in table