DELL N3000 User Manual

Configuring OSPF and OSPFv3

LS Age: 49

LS options: (E-Bit)

LS Type: Network Summary LSA

LS Id: 172.21.0.0 (network prefix)

Advertising Router: 10.10.10.10

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.

Figure 35-40 shows an example topology for flood blocking. The 

configuration follows.

1 Configure R0:

terminal length 0

config

hostname R0

line console 

R3

R0

VLAN 103

R1

R2

VLAN 104

VLAN 101

VLAN 102