Configuring Flood Blocking - Dell Networking N4000 Series Configuration Manual

Stackable layer 2 and 3 switches

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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

Network Mask: 255.255.0.0

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-

Configuring Flood Blocking

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

configuration follows.

Figure 35-40. Flood Blocking Topology

1 Configure R0:

terminal length 0

line console

Configuring OSPF and OSPFv3

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