IGP汇总试验

__________________RIP___________________________________________________________________________

b

1> Config ip address with R1.R2.R3.R4 and Loopback0 is 3.3.x.x/24 . ( x = Router Number )

　 Advertise Loopback0 with relevant IGP

   The router can ping Loopback0 each other.and in routing-table the Loopback's netmask is 24.

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

 

2> R4 & BB1 run RIP，R4 run RIP Version 2，R4 only advertise RIP update to Ethernet0.

　 And only receive 199.9.z.0/24 ( z = odd number ) from BB1.

　 Please use one naming standard ACL accomplish.( Name = WOLF )

 

　 At R4 . When you " show ip route rip ":

    R   199.9.1.0/24 [120/1] via 150.100.1.1, 00:00:12, Ethernet0

    R   199.9.5.0/24 [120/8] via 150.100.1.1, 00:00:12, Ethernet0

    R   199.9.21.0/24 [120/1] via 150.100.1.1, 00:00:12, Ethernet0

 

3> When R4 not receice RIP update from BB1 after 160 seconds. set it "Possible Down".

 

4> R4 only send <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />3.3.0.0/16 to BB1.

 

 

__________________EIGRP_________________________________________________________________________

 

1> R2和R4的S1口运行EIGRP,AS＝90

　 一旦发生拓扑变化。R2不向R4发送Query。

 

2> R2上建立Loopback8 :188.8.8.2/24；Loopback9 :188.8.9.2/24，将Lo8/Lo9宣告进EIGRP。

　 但R4只能收到一条汇总路由（要求精确汇总，不能包含路由黑洞）

3> 配置R4，使R4收到EIGRP路由的Metric为3200000（只能修改bandwidth）

 

　　R4#show ip route eigrp

    　　 3.0.0.0/24 is subnetted, 3 subnets

　　D       3.3.2.0 [90/3200000] via 3.3.24.2, 00:05:56, Serial1

   　　  188.8.0.0/23 is subnetted, 1 subnets

　　D       188.8.8.0 [90/3200000] via 3.3.24.2, 00:05:56, Serial1

 

4> 请将EIGRP占用R4 Serial1口的带宽调整为600K。

 

5> 在R4上将RIP和EIGRP做双向重分布。

 

 

__________________OSPF__________________________________________________________________________

 

1> 如图，运行OSPF。将各接口宣告进相应的Area中。

　 R3从BB2收到4条明细路由，请做相应的设置，使R2只能收到一条汇总路由。

 

2> R1和R3不能使用组播建立邻居关系，并且R1的S1口要成为DR；R3的S1口成为DROTHER。

 

3> 在R2上将EIGRP和OSPF做双向重分布。

　 进入OSPF的外部路由，设置Seed Cost=10，并且在传递过程中Cost要累加。

 

4> R1建立Loopback100 : 3.3.100.1/24,使其他路由器都能访问，但不能用network通告此接口。

 

5> 通过配置，使Area2出现LSA7，并且能产生LSA7默认路由，要求在Area2中出现尽可能少的LSA7。

en

conf t

hostname R5

!

logging queue-limit 100

!

ip subnet-zero

no ip domain lookup

!

!

!

!

interface Loopback0

 ip address 3.3.5.5 255.255.255.0

!

interface Loopback1

 ip address 199.9.1.1 255.255.255.0

!        

interface Loopback4

 ip address 199.9.4.1 255.255.255.0

!

interface Loopback5

 ip address 199.9.5.1 255.255.255.0

!

interface Loopback21

 ip address 199.9.21.1 255.255.255.0

!

interface Loopback22

 ip address 199.9.22.1 255.255.255.0

!

interface Loopback177

 ip address 177.7.16.5 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback178

 ip address 177.7.17.5 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback179

 ip address 177.7.18.5 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback180

 ip address 177.7.19.5 255.255.255.0

 ip ospf network point-to-point

!

interface F0/0

 ip address 150.100.1.1 255.255.255.0

 duplex full

 no sh

!

interface Serial1/0

 ip address 150.100.2.2 255.255.255.0

 no sh

!

router ospf 110

 router-id 3.3.5.5

 log-adjacency-changes

 network 150.100.2.0 0.0.0.255 area 0

 network 177.7.0.0 0.0.255.255 area 0

!

router rip

 network 150.100.0.0

 network 199.9.1.0

 network 199.9.4.0

 network 199.9.5.0

 network 199.9.21.0

 network 199.9.22.0

!

ip http server

ip classless

!

!

!

!

!

line con 0

 exec-timeout 0 0

 logging synchronous

line aux 0

line vty 0 4

!

End

配置：

R1#show run

Building configuration...

 

Current configuration : 1233 bytes

!

version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname R1

!

!

!

!

!

!

ip subnet-zero

no ip domain-lookup

!

ip audit notify log

ip audit po max-events 100

!

!

!        

!

!

!

!

interface Loopback0

 ip address 3.3.1.1 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback100

 ip address 3.3.100.1 255.255.255.0

 ip ospf network point-to-point

!

interface FastEthernet0/0

 no ip address

 shutdown

 duplex auto

 speed auto

!

interface Serial1/0

 ip address 3.3.12.1 255.255.255.0

 serial restart-delay 0

 clockrate 64000

!        

interface Serial1/1

 ip address 3.3.13.1 255.255.255.0

 ip ospf network non-broadcast

 serial restart-delay 0

 clockrate 64000

!

interface Serial1/2

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/3

 no ip address

 shutdown

 serial restart-delay 0

!

router ospf 1

 log-adjacency-changes

 area 0 range 177.7.16.0 255.255.252.0

 area 1 virtual-link 3.3.3.3

 area 2 nssa

 redistribute connected subnets

 network 3.3.12.0 0.0.0.255 area 2

 network 3.3.13.0 0.0.0.255 area 1

 neighbor 3.3.13.3

!

ip classless

ip http server

!

!

!

!

line con 0

 exec-timeout 0 0

line aux 0

line vty 0 4

!

end

-----------------------------------------------------------------

R2#show run

Building configuration...

 

Current configuration : 1452 bytes

!

version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname R2

!

!

!

!

!

!

ip subnet-zero

no ip domain-lookup

!

ip audit notify log

ip audit po max-events 100

!

!

!        

!

!

!

!

interface Loopback0

 ip address 3.3.2.2 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback8

 ip address 188.88.8.2 255.255.255.0

!

interface Loopback9

 ip address 188.88.9.2 255.255.255.0

!

interface FastEthernet0/0

 no ip address

 shutdown

 duplex auto

 speed auto

!

interface Serial1/0

 ip address 3.3.12.2 255.255.255.0

 serial restart-delay 0

!

interface Serial1/1

 ip address 3.3.24.2 255.255.255.0

 ip summary-address eigrp 90 188.88.8.0 255.255.254.0 5

 serial restart-delay 0

 clockrate 64000

!

interface Serial1/2

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/3

 no ip address

 shutdown

 serial restart-delay 0

!

router eigrp 90

 redistribute ospf 1 metric 100 0 255 1 1500

 network 3.3.2.0 0.0.0.255

 network 3.3.24.0 0.0.0.255

 network 188.88.0.0

 no auto-summary

 eigrp log-neighbor-changes

!

router ospf 1

 router-id 3.3.2.2

 log-adjacency-changes

 area 2 nssa no-redistribution default-information-originate

 redistribute eigrp 90 metric 10 metric-type 1 subnets

 network 3.3.12.0 0.0.0.255 area 2

!

ip classless

ip route 0.0.0.0 0.0.0.0 3.3.24.4

ip http server

!

!

!

!

line con 0

 exec-timeout 0 0

line aux 0

line vty 0 4

!

end

---------------------------------------------------------------------------

R3#show run

Building configuration...

 

Current configuration : 1086 bytes

!

version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname R3

!

!

!

!

!

!

ip subnet-zero

no ip domain-lookup

!

ip audit notify log

ip audit po max-events 100

!

!

!        

!

!

!

!

interface Loopback0

 ip address 3.3.3.3 255.255.255.0

 ip ospf network point-to-point

!

interface FastEthernet0/0

 no ip address

 shutdown

 duplex auto

 speed auto

!

interface Serial1/0

 ip address 150.100.2.3 255.255.255.0

 serial restart-delay 0

 clockrate 64000

!

interface Serial1/1

 ip address 3.3.13.3 255.255.255.0

 ip ospf network non-broadcast

 ip ospf priority 0

 serial restart-delay 0

!

interface Serial1/2

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/3

 no ip address

 shutdown

 serial restart-delay 0

!

router ospf 1

 log-adjacency-changes

 area 0 range 177.7.16.0 255.255.252.0

 area 1 virtual-link 3.3.1.1

 network 3.3.13.0 0.0.0.255 area 1

 network 150.100.2.0 0.0.0.255 area 0

!

ip classless

ip http server

!

!        

!

!

line con 0

 exec-timeout 0 0

line aux 0

line vty 0 4

!

end

-----------------------------------------------------------------

R4#show run

Building configuration...

 

Current configuration : 1297 bytes

!

version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname R4

!

!

!

!

!

!

ip subnet-zero

no ip domain-lookup

!

ip audit notify log

ip audit po max-events 100

!

!

!        

!

!

!

!

interface FastEthernet0/0

 ip address 150.100.1.4 255.255.255.0

 ip summary-address rip 3.3.0.0 255.255.0.0

 duplex auto

 speed auto

!

interface Serial1/0

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/1

 bandwidth 1000

 ip address 3.3.24.4 255.255.255.0

 ip bandwidth-percent eigrp 90 60

 serial restart-delay 0

!

interface Serial1/2

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/3

 no ip address

 shutdown

 serial restart-delay 0

!

router eigrp 90

 redistribute rip metric 100 0 255 1 1500

 network 3.3.24.0 0.0.0.255

 no auto-summary

 eigrp log-neighbor-changes

!

router rip

 version 2

 timers basic 30 160 180 180

 redistribute eigrp 90

 network 3.0.0.0

 network 150.100.0.0

 distribute-list wlof in FastEthernet0/0

 no auto-summary

!        

ip classless

ip http server

!

!

ip access-list standard wlof

ip access-list standard wolf

 permit 199.99.1.0 0.0.0.255

 permit 199.99.5.0 0.0.0.255

 permit 199.99.21.0 0.0.0.255

!

!

!

line con 0

 exec-timeout 0 0

line aux 0

line vty 0 4

!

end

------------------------------------------------------------

BB1#show run

Building configuration...

 

Current configuration : 1289 bytes

!

version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname BB1

!

!

!

!

!

!

ip subnet-zero

no ip domain-lookup

!

ip audit notify log

ip audit po max-events 100

!

!

!        

!

!

!

!

interface Loopback0

 ip address 3.3.5.5 255.255.255.0

!

interface Loopback1

 ip address 199.99.1.1 255.255.255.0

!

interface Loopback4

 ip address 199.99.4.1 255.255.255.0

!

interface Loopback5

 ip address 199.99.5.1 255.255.255.0

!

interface Loopback21

 ip address 199.99.21.1 255.255.255.0

!

interface Loopback22

 ip address 199.99.22.1 255.255.255.0

!

interface FastEthernet0/0

 ip address 150.100.1.1 255.255.255.0

 duplex auto

 speed auto

!

interface Serial1/0

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/1

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/2

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/3

 no ip address

 shutdown

 serial restart-delay 0

!

router rip

 version 2

 timers basic 30 160 180 180

 network 150.100.0.0

 network 199.99.1.0

 network 199.99.4.0

 network 199.99.5.0

 network 199.99.21.0

 network 199.99.22.0

 no auto-summary

!

ip classless

ip http server

!

!

!

!

line con 0

 exec-timeout 0 0

line aux 0

line vty 0 4

!        

end

-----------------------------------------------------------------

BB2#show run

Building configuration...

 

Current configuration : 1445 bytes

!

version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname BB2

!

!

!

!

!

!

ip subnet-zero

no ip domain-lookup

!

ip audit notify log

ip audit po max-events 100

!

!

!        

!

!

!

!

interface Loopback0

 ip address 3.3.6.6 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback177

 ip address 177.7.16.5 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback178

 ip address 177.7.17.5 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback179

 ip address 177.7.18.5 255.255.255.0

 ip ospf network point-to-point

!

interface Loopback180

 ip address 177.7.19.5 255.255.255.0

 ip ospf network point-to-point

!

interface FastEthernet0/0

 no ip address

 shutdown

 duplex auto

 speed auto

!

interface Serial1/0

 ip address 150.100.2.2 255.255.255.0

 serial restart-delay 0

!

interface Serial1/1

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/2

 no ip address

 shutdown

 serial restart-delay 0

!

interface Serial1/3

 no ip address

 shutdown

 serial restart-delay 0

!

router ospf 1

 router-id 3.3.6.6

 log-adjacency-changes

 network 150.100.2.0 0.0.0.255 area 0

 network 177.7.16.0 0.0.0.255 area 0

 network 177.7.17.0 0.0.0.255 area 0

 network 177.7.18.0 0.0.0.255 area 0

 network 177.7.19.0 0.0.0.255 area 0

!

ip classless

ip http server

!

!

!

!

line con 0

 exec-timeout 0 0

line aux 0

line vty 0 4

!        

end

-------------------------------------------------------------------

R1#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

       * - candidate default, U - per-user static route, o - ODR

       P - periodic downloaded static route

 

Gateway of last resort is 3.3.12.2 to network 0.0.0.0

 

     3.0.0.0/24 is subnetted, 4 subnets

C       3.3.1.0 is directly connected, Loopback0

C       3.3.12.0 is directly connected, Serial1/0

C       3.3.13.0 is directly connected, Serial1/1

C       3.3.100.0 is directly connected, Loopback100

     177.7.0.0/16 is variably subnetted, 5 subnets, 2 masks

O       177.7.18.0/24 [110/129] via 3.3.13.3, 00:10:51, Serial1/1

O       177.7.19.0/24 [110/129] via 3.3.13.3, 00:10:51, Serial1/1

O       177.7.16.0/22 is a summary, 00:10:51, Null0

O       177.7.16.0/24 [110/129] via 3.3.13.3, 00:10:51, Serial1/1

O       177.7.17.0/24 [110/129] via 3.3.13.3, 00:10:51, Serial1/1

     150.100.0.0/24 is subnetted, 1 subnets

O       150.100.2.0 [110/128] via 3.3.13.3, 00:10:51, Serial1/1

O*N2 0.0.0.0/0 [110/1] via 3.3.12.2, 00:10:52, Serial1/0

-------------------------------------------------------------------------

R2#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

       * - candidate default, U - per-user static route, o - ODR

       P - periodic downloaded static route

 

Gateway of last resort is 3.3.24.4 to network 0.0.0.0

 

     3.0.0.0/24 is subnetted, 6 subnets

O N2    3.3.1.0 [110/20] via 3.3.12.1, 00:15:37, Serial1/0

C       3.3.2.0 is directly connected, Loopback0

C       3.3.12.0 is directly connected, Serial1/0

O IA    3.3.13.0 [110/128] via 3.3.12.1, 00:15:37, Serial1/0

C       3.3.24.0 is directly connected, Serial1/1

O N2    3.3.100.0 [110/20] via 3.3.12.1, 00:15:37, Serial1/0

     188.88.0.0/16 is variably subnetted, 3 subnets, 2 masks

D       188.88.8.0/23 is a summary, 01:54:28, Null0

C       188.88.8.0/24 is directly connected, Loopback8

C       188.88.9.0/24 is directly connected, Loopback9

D EX 199.99.1.0/24 [170/26112000] via 3.3.24.4, 01:48:29, Serial1/1

     177.7.0.0/22 is subnetted, 1 subnets

O IA    177.7.16.0 [110/193] via 3.3.12.1, 00:11:19, Serial1/0

D EX 199.99.22.0/24 [170/26112000] via 3.3.24.4, 01:48:30, Serial1/1

D EX 199.99.5.0/24 [170/26112000] via 3.3.24.4, 01:48:30, Serial1/1

     150.100.0.0/24 is subnetted, 2 subnets

O IA    150.100.2.0 [110/192] via 3.3.12.1, 00:15:24, Serial1/0

D EX    150.100.1.0 [170/26112000] via 3.3.24.4, 01:48:30, Serial1/1

D EX 199.99.21.0/24 [170/26112000] via 3.3.24.4, 01:48:30, Serial1/1

D EX 199.99.4.0/24 [170/26112000] via 3.3.24.4, 01:48:30, Serial1/1

S*   0.0.0.0/0 [1/0] via 3.3.24.4

---------------------------------------------------------------------

R3#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

       * - candidate default, U - per-user static route, o - ODR

       P - periodic downloaded static route

 

Gateway of last resort is 3.3.13.1 to network 0.0.0.0

 

     3.0.0.0/24 is subnetted, 5 subnets

O E2    3.3.1.0 [110/20] via 3.3.13.1, 00:15:54, Serial1/1

C       3.3.3.0 is directly connected, Loopback0

O IA    3.3.12.0 [110/128] via 3.3.13.1, 00:15:54, Serial1/1

C       3.3.13.0 is directly connected, Serial1/1

O E2    3.3.100.0 [110/20] via 3.3.13.1, 00:15:54, Serial1/1

     177.7.0.0/16 is variably subnetted, 5 subnets, 2 masks

O       177.7.18.0/24 [110/65] via 150.100.2.2, 00:15:54, Serial1/0

O       177.7.19.0/24 [110/65] via 150.100.2.2, 00:15:54, Serial1/0

O       177.7.16.0/22 is a summary, 00:15:54, Null0

O       177.7.16.0/24 [110/65] via 150.100.2.2, 00:15:54, Serial1/0

O       177.7.17.0/24 [110/65] via 150.100.2.2, 00:15:54, Serial1/0

     150.100.0.0/24 is subnetted, 1 subnets

C       150.100.2.0 is directly connected, Serial1/0

O*E2 0.0.0.0/0 [110/1] via 3.3.13.1, 00:15:54, Serial1/1

-------------------------------------------------------------------------

R4#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

       * - candidate default, U - per-user static route, o - ODR

       P - periodic downloaded static route

 

Gateway of last resort is not set

 

     3.0.0.0/24 is subnetted, 6 subnets

D EX    3.3.1.0 [170/26112000] via 3.3.24.2, 00:48:21, Serial1/1

D       3.3.2.0 [90/3200000] via 3.3.24.2, 01:51:50, Serial1/1

D EX    3.3.12.0 [170/26112000] via 3.3.24.2, 01:29:56, Serial1/1

D EX    3.3.13.0 [170/26112000] via 3.3.24.2, 00:16:42, Serial1/1

C       3.3.24.0 is directly connected, Serial1/1

D EX    3.3.100.0 [170/26112000] via 3.3.24.2, 00:48:21, Serial1/1

     188.88.0.0/23 is subnetted, 1 subnets

D       188.88.8.0 [90/3200000] via 3.3.24.2, 01:53:49, Serial1/1

R    199.99.1.0/24 [120/1] via 150.100.1.1, 00:00:27, FastEthernet0/0

     177.7.0.0/22 is subnetted, 1 subnets

D EX    177.7.16.0 [170/26112000] via 3.3.24.2, 00:12:23, Serial1/1

R    199.99.22.0/24 [120/1] via 150.100.1.1, 00:00:27, FastEthernet0/0

R    199.99.5.0/24 [120/1] via 150.100.1.1, 00:00:27, FastEthernet0/0

     150.100.0.0/24 is subnetted, 2 subnets

D EX    150.100.2.0 [170/26112000] via 3.3.24.2, 00:16:28, Serial1/1

C       150.100.1.0 is directly connected, FastEthernet0/0

R    199.99.21.0/24 [120/1] via 150.100.1.1, 00:00:27, FastEthernet0/0

R    199.99.4.0/24 [120/1] via 150.100.1.1, 00:00:27, FastEthernet0/0

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BB1#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

       * - candidate default, U - per-user static route, o - ODR

       P - periodic downloaded static route

 

Gateway of last resort is not set

 

     3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

R       3.3.0.0/16 [120/1] via 150.100.1.4, 00:00:13, FastEthernet0/0

C       3.3.5.0/24 is directly connected, Loopback0

C    199.99.1.0/24 is directly connected, Loopback1

C    199.99.22.0/24 is directly connected, Loopback22

C    199.99.5.0/24 is directly connected, Loopback5

     150.100.0.0/24 is subnetted, 1 subnets

C       150.100.1.0 is directly connected, FastEthernet0/0

C    199.99.21.0/24 is directly connected, Loopback21

C    199.99.4.0/24 is directly connected, Loopback4

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