Users Guide
OSPF and OSPFv3 1337
LS Seq Number: 0x80000003
Checksum: 0x78f8
Length: 28
Network Mask: 255.255.0.0
Metric: 0
The cost can be set to the maximum value, 16,777,215, which is LSInfinity.
Since OSPF cannot send a type 3 summary LSA with this metric (according
to RFC 2328), the summary LSA is flushed. The individual routes are not re-
advertised.
Configuring Flood Blocking
Figure 34-40 shows an example topology for flood blocking. The
configuration follows.
Figure 34-40. Flood Blocking Topology
1
Configure R0:
terminal length 0
config
hostname R0
line console
exec-timeout 0
exit
vlan 101-103
exit
ip routing
router ospf