Verifique a configuração

Verify the configuration:

# After the configurations on Switch A, Switch B, and Switch C are completed and the switches are

running steadily, enable OSPF Graceful Restart event debugging and then restart the OSPF

process using GR on Switch A.

<SwitchA> debugging ospf event graceful-restart

<SwitchA> terminal monitor

<SwitchA> terminal debugging

<SwitchA> reset ospf 100 process graceful-restart

Warning : Reset OSPF process? [Y/N]:y

%Dec 12 09:36:12:500 2006 SwitchA RM/3/RMLOG:OSPF-NBRCHANGE: Process 100, Neighbour

192.1.1.1(Vlan100) from Full to Down

OSPF 100: Intf 192.1.1.1 Rcv InterfaceDown State BackupDR -> Down.

OSPF 100 nonstandard GR Started for OSPF Router

OSPF 100 notify RM that OSPF process will enter GR.

OSPF 100 created GR wait timer, timeout interval is 40(s).

OSPF 100 created GR Interval timer,timeout interval is 120(s).

OSPF 100: Intf 192.1.1.1 Rcv InterfaceUp State Down -> Waiting.

OSPF 100: Intf 192.1.1.1 Rcv BackupSeen State Waiting -> BackupDR.

OSPF 100 created OOB Progress timer for neighbor 192.1.1.2.

OSPF 100 restarted OOB Progress timer for neighbor 192.1.1.2.

OSPF 100 restarted OOB Progress timer for neighbor 192.1.1.2.

%Oct 22 09:36:12:566 2008 SwitchA RM/3/RMLOG:OSPF-NBRCHANGE: Process 100, Neighbour

192.1.1.2(Vlan100) from Loading to Full

OSPF 100 restarted OOB Progress timer for neighbor 192.1.1.2.

OSPF 100 deleted OOB Progress timer for neighbor 192.1.1.2.

OSPF 100 Gr Wait Timeout timer fired.

OSPF 100 deleted GR wait timer.

OSPF 100 deleted GR Interval timer.

OSPF 100 GR Completed for OSPF Router

OSPF 100 notified RM that OSPF process left GR.

RM notified that all protocol left GR.

OSPF 100 started flushing STALE LSA after all protocol left GR.

OSPF 100: Flush Stale Area LSAs

OSPF 100: Start Flush Stale ASE + NSSA LSAs

OSPF 100: End Flush Stale ASE + NSSA LSAs

Switch A completes GR with the help of Switch B.

118

Configuring route filtering

Network requirements

As shown in Figure 46:

• All the switches in the network run OSPF. The AS is divided into three areas.

• Switch A and Switch B work as ABRs.

Configure Switch C as an ASBR to redistribute external routes (static routes), and configure a filter policy

on Switch C to filter out redistributed route 3.1.3.0/24.

Configure a routing policy on Switch A to filter route 10.5.1.0/24.

Figure 46 Network diagram

Configuration procedure

1. Configure IP addresses for interfaces. (Details not shown.)

2. Configure OSPF basic functions. (See "Configuring OSPF basic functions")

3. Configure OSPF to redistribute routes:

# On Switch C, configure a static route destined for network 3.1.1.0/24.

<SwitchC> system-view

[SwitchC] ip route-static 3.1.1.0 24 10.4.1.2

# On Switch C, configure a static route destined for network 3.1.2.0/24.

[SwitchC] ip route-static 3.1.2.0 24 10.4.1.2

# On Switch C, configure a static route destined for network 3.1.3.0/24.

[SwitchC] ip route-static 3.1.3.0 24 10.4.1.2

# On Switch C, configure OSPF to redistribute static routes.

[SwitchC] ospf 1

[SwitchC-ospf-1] import-route static

[SwitchC-ospf-1] quit

# Display the OSPF routing table of Switch A.

<SwitchA> display ip routing-table

Routing Tables: Public

Destinations : 12

Destination/Mask

Proto

Routes : 12

Pre

Cost

119

NextHop

Interface

3.1.1.0/24 150 1 10.2.1.2 Vlan200

O_ASE 150 1 10.2.1.2 Vlan200

3.1.3.0/24 O_ASE 150 1 10.2.1.2 Vlan200

10.1.1.0/24 Direct 0 0 10.1.1.1 Vlan200

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

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

4.

O_ASE 3.1.2.0/24 Direct 0 0 127.0.0.1 InLoop0