PHP效率优化的一些细节

R1#sh ip route
1.0.0.0/24 is subnetted, 1 subnets

C 1.1.1.0 is directly connected, Serial0/0

2.0.0.0/24 is subnetted, 1 subnets

O IA 2.2.2.0 [110/192] via 1.1.1.2, 00:01:15, Serial0/0

3.0.0.0/32 is subnetted, 1 subnets

O IA 3.3.3.3 [110/129] via 1.1.1.2, 00:09:15, Serial0/0

4.0.0.0/24 is subnetted, 1 subnets

O IA 4.4.4.0 [110/192] via 1.1.1.2, 00:04:43, Serial0/0

172.16.0.0/24 is subnetted, 1 subnets

O IA 172.16.1.0 [110/128] via 1.1.1.2, 00:09:15, Serial0/0
======================================
R1:
router ospf 1

distribute-list 1 in

!

access-list 1 deny 2.2.2.0 0.0.0.255

access-list 1 deny 3.3.3.0 0.0.0.255

access-list 1 permit any
======================================
R1#sh ip route
1.0.0.0/24 is subnetted, 1 subnets

C 1.1.1.0 is directly connected, Serial0/0

4.0.0.0/24 is subnetted, 1 subnets

O IA 4.4.4.0 [110/192] via 1.1.1.2, 00:00:28, Serial0/0

172.16.0.0/24 is subnetted, 1 subnets

O IA 172.16.1.0 [110/128] via 1.1.1.2, 00:00:28, Serial0/0
R1#sh ip ospf database （已阻止2.2.2.2与3.3.3.3进入路由，但仍在数据库中找到）
OSPF Router with ID (1.1.1.1) (Process ID 1)
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count

1.1.1.1 1.1.1.1 678 0x80000003 0x00A8E2 2

2.2.2.2 2.2.2.2 1392 0x80000002 0x004D39 2
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum

2.2.2.0 2.2.2.2 204 0x80000001 0x000AA4

3.3.3.3 2.2.2.2 1333 0x80000001 0x004F98

4.4.4.0 2.2.2.2 412 0x80000001 0x00C1E6

172.16.1.0 2.2.2.2 1388 0x80000001 0x003FF7

另一种配置
===================================
R1:
router ospf 1

distribute-list filter-ospf in

!

ip access-list standard filter-ospf

deny 2.2.2.0 0.0.0.255

deny 3.3.3.0 0.0.0.255

permit any