3com S7906E 설치 설명서
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10.2.1.1/32 Direct 0 0 127.0.0.1 InLoop0
10.3.1.0/24 OSPF 10 4 10.1.1.2 Vlan100
10.4.1.0/24 OSPF 10 13 10.2.1.2 Vlan200
10.5.1.0/24 OSPF 10 14 10.1.1.2 Vlan100
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
The route destined for network 3.1.3.0/24 is filtered out.
5) On Switch A, filter out the route 10.5.1.1/24.
# Configure the ACL on Switch A.
<SwitchA> system-view
[SwitchA] acl number 2000
[SwitchA-acl-basic-2000] rule 0 deny source 10.5.1.0 0.0.0.255
[SwitchA-acl-basic-2000] rule 1 permit source any
[SwitchA-acl-basic-2000] quit
# Use the ACL to filter route 10.5.1.0/24.
[SwitchA] ospf 1
[SwitchA-ospf-1] filter-policy 2000 import
[SwitchA-ospf-1] quit
# Display the OSPF routing table of Switch A.
[SwitchA] display ip routing-table
Routing Tables: Public
Destinations : 10 Routes : 10
Destination/Mask Proto Pre Cost NextHop Interface
3.1.1.0/24 O_ASE 150 1 10.2.1.2 Vlan200
3.1.2.0/24 O_ASE 150 1 10.2.1.2 Vlan200
10.1.1.0/24 Direct 0 0 10.1.1.1 Vlan100
10.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
10.2.1.0/24 Direct 0 0 10.2.1.1 Vlan200
10.2.1.1/32 Direct 0 0 127.0.0.1 InLoop0
10.3.1.0/24 OSPF 10 4 10.1.1.2 Vlan100
10.4.1.0/24 OSPF 10 13 10.2.1.2 Vlan200
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
The route destined for 10.5.1.1/24 is filtered out.
Configuring BFD for OSPF
Network requirements
z
Switch A and Switch B are interconnected through a Layer 2 switch. BFD is enabled on the switch
interfaces. OSPF is enabled on the switches that are reachable to each other at the network layer.
z
When the link between Switch B and the Layer 2 switch fails, BFD can quickly detect the failure and
notify OSPF of the failure.