IPv6 / DHCPv6 Server Statless

IPv6 / DHCPv6 Server Statless


=====================
PC0 IP Info


=====================
PC1 IP Info

=====================

R1#show ipv6 dhcp interface
GigabitEthernet0/0 is in server mode
  Using pool: mypool
  Preference value: 0
  Hint from client: ignored
  Rapid-Commit: disabled
R1#

R1#show ipv6 dhcp pool
DHCPv6 pool: mypool
  DNS server: 2001:DB8::1
  Domain name: fff.com
  Active clients: 0
R1#


R1#show ipv6 dhcp binding
Client: 0001.6395.2410 (GigabitEthernet0/0)
  DUID: 00030001000163952410
  IA PD: IA ID 0, T1 0, T2 0
    Prefix: 0.0.0.0/0
            preferred lifetime 0, valid lifetime 0
            expires at ?? 18 2016 2:39:56 pm (0 seconds)
Client: 00D0.D357.E21B (GigabitEthernet0/0)
  DUID: 0003000100D0D357E21B
  IA PD: IA ID 0, T1 0, T2 0
    Prefix: 0.0.0.0/0
            preferred lifetime 0, valid lifetime 0
            expires at ?? 18 2016 2:39:56 pm (0 seconds)
R1#

=====================

R1#sh run
Building configuration...

Current configuration : 711 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
ipv6 unicast-routing
!
!
ipv6 dhcp pool mypool
 dns-server 2001:DB8::1
 domain-name fff.com
!
!
!
!
!
!
license udi pid CISCO2901/K9 sn FTX15248605
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 ipv6 address 2001::1/64
 ipv6 nd other-config-flag
 ipv6 enable
 ipv6 dhcp server mypool
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end


R1#
R1#
R1#


=====================

IPv6 / DHCPv6 Server Stateful

IPv6 / DHCPv6 Server Stateful




==========================
PC0 IP Info :


==========================
PC1 IP Info :


==========================

R1#show ipv6 dhcp interface
GigabitEthernet0/0 is in server mode
  Using pool: mypool
  Preference value: 0
  Hint from client: ignored
  Rapid-Commit: disabled
R1#
R1#
R1#

R1#show ipv6 dhcp pool
DHCPv6 pool: mypool
  Prefix pool: local-pool
               preferred lifetime 1800, valid lifetime 600
  DNS server: 2001:DB8::1
  Domain name: fff.com
  Active clients: 2
R1#
R1#


R1#
R1#show ipv6 dhcp binding
Client: 0001.6395.2410 (GigabitEthernet0/0)
  DUID: 00030001000163952410
  IA PD: IA ID 0, T1 0, T2 0
    Prefix: 2001::/64
            preferred lifetime 1800, valid lifetime 600
            expires at ?? 18 2016 11:44:27 am (600 seconds)
Client: 00D0.D357.E21B (GigabitEthernet0/0)
  DUID: 0003000100D0D357E21B
  IA PD: IA ID 0, T1 0, T2 0
    Prefix: 2001::/64
            preferred lifetime 1800, valid lifetime 600
            expires at ?? 18 2016 11:44:27 am (600 seconds)
R1#
R1#

==========================
R1#sh run
Building configuration...

Current configuration : 777 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
ipv6 unicast-routing
!
!
ipv6 dhcp pool mypool
 prefix-delegation pool local-pool lifetime 1800 600
 dns-server 2001:DB8::1
 domain-name fff.com
!
ipv6 local pool local-pool 2001::/64 64
!
!
!
!
!
license udi pid CISCO2901/K9 sn FTX15248605
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 ipv6 address 2001::1/64
 ipv6 enable
 ipv6 dhcp server mypool
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end


R1#
==========================

DHCP Relay

DHCP Relay



====================
DHCP Server Pool


====================
PC0  : ip info

====================
PC1  : ip info

====================
Router#sh run
!
hostname Router
!
interface FastEthernet0/0
 ip address 192.168.1.254 255.255.255.0
 ip helper-address 10.0.0.1
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 10.0.0.254 255.255.255.0
 duplex auto
 speed auto
!
!
interface FastEthernet1/0
 ip address 192.168.2.254 255.255.255.0
 ip helper-address 10.0.0.1
 duplex auto
 speed auto
!
Router#

====================

Enable NAT(PAT) on DHCP Server

Enable NAT(PAT) on DHCP Server


=========================
PC>ping 192.168.3.10

Pinging 192.168.3.10 with 32 bytes of data:

Reply from 192.168.3.10: bytes=32 time=1ms TTL=126
Reply from 192.168.3.10: bytes=32 time=1ms TTL=126
Reply from 192.168.3.10: bytes=32 time=1ms TTL=126
Reply from 192.168.3.10: bytes=32 time=1ms TTL=126

Ping statistics for 192.168.3.10:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 1ms, Maximum = 1ms, Average = 1ms

PC>

=========================
R1#sh ip nat translations
Pro  Inside global     Inside local       Outside local      Outside global
icmp 10.0.0.1:5        192.168.1.10:5     192.168.3.10:5     192.168.3.10:5
icmp 10.0.0.1:6        192.168.1.10:6     192.168.3.10:6     192.168.3.10:6
icmp 10.0.0.1:7        192.168.1.10:7     192.168.3.10:7     192.168.3.10:7
icmp 10.0.0.1:8        192.168.1.10:8     192.168.3.10:8     192.168.3.10:8
icmp 10.0.0.1:10       192.168.2.10:10    192.168.3.10:10    192.168.3.10:10
icmp 10.0.0.1:11       192.168.2.10:11    192.168.3.10:11    192.168.3.10:11
icmp 10.0.0.1:12       192.168.2.10:12    192.168.3.10:12    192.168.3.10:12
icmp 10.0.0.1:9        192.168.2.10:9     192.168.3.10:9     192.168.3.10:9

R1#
=========================

R1#sh ip nat statistics
Total translations: 0 (0 static, 0 dynamic, 0 extended)
Outside Interfaces: Serial0/0/0
Inside Interfaces: FastEthernet0/0 , FastEthernet0/1
Hits: 19  Misses: 20
Expired translations: 20
Dynamic mappings:
-- Inside Source
access-list 10 pool mypool refCount 0
 pool mypool: netmask 255.255.255.252
       start 10.0.0.1 end 10.0.0.1
       type generic, total addresses 1 , allocated 0 (0%), misses 0
R1#

=========================

R1#show ip dhcp binding
IP address       Client-ID/              Lease expiration        Type
                 Hardware address
192.168.1.10     0001.C706.A76A           --                     Automatic
192.168.2.10     0001.4348.BE92           --                     Automatic
R1#
R1#

=========================
R1#sh run
!
hostname R1
!
!
!
!
ip dhcp excluded-address 192.168.1.1 192.168.1.9
ip dhcp excluded-address 192.168.2.1 192.168.2.9
!
ip dhcp pool mydhcp
 network 192.168.1.0 255.255.255.0
 default-router 192.168.1.254
 dns-server 8.8.8.8
ip dhcp pool mydhcp2
 network 192.168.2.0 255.255.255.0
 default-router 192.168.2.254
 dns-server 8.8.8.8
!
!
interface FastEthernet0/0
 ip address 192.168.1.254 255.255.255.0
 ip nat inside
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 192.168.2.254 255.255.255.0
 ip nat inside
 duplex auto
 speed auto
!
interface Serial0/0/0
 ip address 10.0.0.1 255.255.255.252
 ip nat outside
!
!
router ospf 1
 log-adjacency-changes
 network 192.168.1.0 0.0.0.255 area 0.0.0.0
 network 192.168.2.0 0.0.0.255 area 0.0.0.0
 network 10.0.0.0 0.0.0.3 area 0.0.0.0
!
ip nat pool mypool 10.0.0.1 10.0.0.1 netmask 255.255.255.252
ip nat inside source list 10 pool mypool overload
ip classless
!
!
access-list 10 permit 192.168.1.0 0.0.0.255
access-list 10 permit 192.168.2.0 0.0.0.255
!
!
end


R1#

=========================

R2#sh run
!
hostname R2
!
interface GigabitEthernet0/0
 ip address 192.168.3.254 255.255.255.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 10.0.0.2 255.255.255.252
!
router ospf 1
 log-adjacency-changes
 network 192.168.3.0 0.0.0.255 area 0.0.0.0
 network 10.0.0.0 0.0.0.3 area 0.0.0.0
!
end

R2#
=========================

DHCP Server

======================
R1#show ip dhcp binding
IP address       Client-ID/              Lease expiration        Type
                 Hardware address
192.168.1.10     0001.C706.A76A           --                     Automatic
192.168.2.10     0001.4348.BE92           --                     Automatic
R1#
======================
R1#sh run
!
hostname R1
!
ip dhcp excluded-address 192.168.1.1 192.168.1.9
ip dhcp excluded-address 192.168.2.1 192.168.2.9
!
ip dhcp pool mydhcp
 network 192.168.1.0 255.255.255.0
 default-router 192.168.1.254
 dns-server 8.8.8.8
ip dhcp pool mydhcp2
 network 192.168.2.0 255.255.255.0
 default-router 192.168.2.254
 dns-server 8.8.8.8
!
!
interface FastEthernet0/0
 ip address 192.168.1.254 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 192.168.2.254 255.255.255.0
 duplex auto
 speed auto
!
end

R1#
======================
PC1 : IP Info


======================
PC0 : IP Info


======================

GLBP

========================

PC1> trace 172.22.0.10

trace to 172.22.0.10, 8 hops max, press Ctrl+C to stop

 1   192.168.1.2   10.729 ms  46.105 ms  43.563 ms

 2   10.1.2.2   67.146 ms  70.208 ms  35.733 ms

 3   *172.22.0.10   79.383 ms (ICMP type:3, code:3, Destination port unreachable)

PC1> trace 172.22.0.10

trace to 172.22.0.10, 8 hops max, press Ctrl+C to stop

 1   192.168.1.1   45.901 ms  45.564 ms  10.267 ms

 2   10.1.1.2   32.789 ms  59.528 ms  66.543 ms

 3   *172.22.0.10   79.247 ms (ICMP type:3, code:3, Destination port unreachable)

PC1> 

========================

========================

========================

R1#sh run

!

hostname R1

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 mac-address aaaa.aaaa.aaaa

 ip address 192.168.1.1 255.255.255.0

 duplex auto

 speed auto

 glbp 100 ip 192.168.1.254

 glbp 100 preempt

!

!

interface Serial1/0

 ip address 10.1.1.1 255.255.255.252

 encapsulation ppp

!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

end

R1# 

========================

R2#sh run

!

hostname R2

!

!

interface FastEthernet0/0

 mac-address cccc.cccc.cccc

 ip address 192.168.1.2 255.255.255.0

 duplex auto

 speed auto

 glbp 100 ip 192.168.1.254

 glbp 100 priority 90

 glbp 100 preempt

!

!

interface Serial1/0

 ip address 10.1.2.1 255.255.255.252

 encapsulation ppp

 serial restart-delay 0

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!         

end

R2#  

========================

R3#sh run

!

hostname R3

!

!

interface FastEthernet0/0

 mac-address eeee.eeee.eeee

 ip address 172.22.0.1 255.255.255.0

 duplex auto

 speed auto

 glbp 100 ip 172.22.0.254

 glbp 100 preempt

!

interface Serial1/0

 ip address 10.1.1.2 255.255.255.0

 encapsulation ppp

 serial restart-delay 0

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

end

R3# 

========================

R4#sh run

!

hostname R4

!

interface FastEthernet0/0

 mac-address aaaa.aaaa.aaaa

 ip address 172.22.0.2 255.255.255.0

 duplex auto

 speed auto

 glbp 100 ip 172.22.0.254

 glbp 100 priority 90

 glbp 100 preempt

!

!

interface Serial1/0

 ip address 10.1.2.2 255.255.255.252

 encapsulation ppp

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

R4# 

========================

PAT (Port Address Translation)

==========================

R2#

R2#sh run

!

hostname R2

!

interface FastEthernet0/0

 ip address 192.168.1.254 255.255.255.0

 ip nat inside

 ip virtual-reassembly

 duplex auto

 speed auto

!

interface FastEthernet0/1

 ip address 100.1.1.1 255.255.255.0

 ip nat outside

 ip virtual-reassembly

 duplex auto

 speed auto

!

!

ip nat pool pat 100.1.1.1 100.1.1.1 netmask 255.255.255.0

ip nat inside source list 10 pool pat overload

!

access-list 10 permit 192.168.1.0 0.0.0.255

!

!

end

R2# 

==========================


==========================

R1#sh run

!

hostname R1

!

interface FastEthernet0/0

 no ip address

 shutdown

 duplex auto

 speed auto

!

interface FastEthernet0/1

 ip address 100.1.1.2 255.255.255.0

 duplex auto

 speed auto

!

ip route 192.168.1.0 255.255.255.0 100.1.1.1

R1#  

==========================

VRRP track on ethernet

VRRP track on ethernet



=================================

R1#sh run

!

hostname R1

!

!

track 1 rtr 1

!

interface FastEthernet0/0

 ip address 192.168.1.250 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 192.168.1.254

 vrrp 1 priority 110

 vrrp 1 authentication md5 key-string 123

 vrrp 1 track 1 decrement 50

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

ip sla 1

 icmp-echo 10.1.1.2 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

!

R1#  

=================================



=================================

R2#sh run

!

hostname R2

!

track 1 rtr 1

!

interface FastEthernet0/0

 ip address 192.168.1.251 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 192.168.1.254

 vrrp 1 authentication md5 key-string 123

 vrrp 1 track 1 decrement 50

!

interface FastEthernet0/1

 ip address 10.1.2.1 255.255.255.252

 duplex auto

 speed auto

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

ip sla 1

 icmp-echo 10.1.2.2 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

end

R2#  

=================================

=================================

R3#

R3#

R3#sh run

!

hostname R3

!

!

track 1 rtr 1

!

!

interface FastEthernet0/0

 ip address 172.22.0.250 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 172.22.0.254

 vrrp 1 priority 110

 vrrp 1 authentication md5 key-string 123

 vrrp 1 track 1 decrement 50

!

interface FastEthernet0/1

 ip address 10.1.1.2 255.255.255.252

 duplex auto

 speed auto

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

!

ip sla 1

 icmp-echo 10.1.1.1 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

!

end

R3#  

=================================

=================================

R4#sh run

!

hostname R4

!

!

interface FastEthernet0/0

 ip address 172.22.0.251 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 172.22.0.254

 vrrp 1 authentication md5 key-string 123

!

interface FastEthernet0/1

 ip address 10.1.2.2 255.255.255.252

 duplex auto

 speed auto

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

!

ip sla 1  

 icmp-echo 10.1.2.1 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

end

R4#  

=================================

HSRP track on ethernet

hsrp track on ethernet



==================================

R1#

R1#sh run

version 12.4

!

hostname R1

!

!

ip tcp synwait-time 5

!

track 1 rtr 1

!

interface FastEthernet0/0

 ip address 192.168.1.250 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 192.168.1.254

 standby 1 priority 110

 standby 1 preempt

 standby 1 authentication md5 key-string 123

 standby 1 track 1 decrement 50

!

interface FastEthernet0/1

 ip address 10.1.1.1 255.255.255.252

 duplex auto

 speed auto

!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

!

ip sla 1

 icmp-echo 10.1.1.2 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

webvpn cef

!

end

          

R1#   

==================================

==================================

R2#

R2#sh run

Building configuration...

!

hostname R2

!

!

track 1 rtr 1

!

!

!

!

interface FastEthernet0/0

 ip address 192.168.1.251 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 192.168.1.254

 standby 1 preempt

 standby 1 authentication md5 key-string 123

 standby 1 track 1 decrement 50

!

interface FastEthernet0/1

 ip address 10.1.2.1 255.255.255.252

 duplex auto

 speed auto

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

!

ip sla 1

 icmp-echo 10.1.2.2 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

!

end

R2#   

==================================

==================================

R3#sh run

!

hostname R3

!

track 1 rtr 1

!

interface FastEthernet0/0

 ip address 172.22.0.250 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 172.22.0.254

 standby 1 priority 110

 standby 1 preempt

 standby 1 authentication md5 key-string 123

 standby 1 track 1 decrement 50

!

interface FastEthernet0/1

 ip address 10.1.1.2 255.255.255.252

 shutdown

 duplex auto

 speed auto

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!         

!

ip sla 1

 icmp-echo 10.1.1.1 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

end       

R3#   

==================================



==================================

R4#sh  run

!

hostname R4

!

track 1 rtr 1

!

interface FastEthernet0/0

 ip address 172.22.0.251 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 172.22.0.254

 standby 1 preempt

 standby 1 authentication md5 key-string 123

!

interface FastEthernet0/1

 ip address 10.1.2.2 255.255.255.252

 duplex auto

 speed auto

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

!         

ip sla 1

 icmp-echo 10.1.2.1 source-interface FastEthernet0/1

 frequency 5

ip sla schedule 1 life forever start-time now

!

end

R4# 

==================================

HSRP track on serial

HSRP track on serial interface




===============================

R1#sh run

Building configuration...

Current configuration : 1589 bytes

!

!

hostname R1

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 192.168.1.250 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 192.168.1.254

 standby 1 priority 110

 standby 1 preempt

 standby 1 authentication md5 key-string 123

 standby 1 track 1 decrement 50

!!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

end

R1#    

===============================


===============================

R2#sh run

Building configuration...

!

hostname R2

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 192.168.1.251 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 192.168.1.254

 standby 1 preempt

 standby 1 authentication md5 key-string 123

 standby 1 track 1 decrement 50

!

interface Serial1/0

 ip address 10.1.2.1 255.255.255.252

 encapsulation ppp

 serial restart-delay 0

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!         

!

end

R2# 

===============================


===============================

R3#sh run

Building configuration...

!

hostname R3

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 172.22.0.250 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 172.22.0.254

 standby 1 priority 110

 standby 1 preempt

 standby 1 authentication md5 key-string 123

 standby 1 track 1 decrement 50

!

!

interface Serial1/0

 ip address 10.1.1.2 255.255.255.0

 encapsulation ppp

 serial restart-delay 0

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!         

!

end

R3#   

===============================

===============================

R4#

R4#sh run

!

hostname R4

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 172.22.0.251 255.255.255.0

 duplex auto

 speed auto

 standby 1 ip 172.22.0.254

 standby 1 preempt

 standby 1 authentication md5 key-string 123

 standby 1 track 1 decrement 50 

!

interface Serial1/0

 ip address 10.1.2.2 255.255.255.252

 encapsulation ppp

 serial restart-delay 0

!

!

router ospf 1

 log-adjacency-changes

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

R4#     

===============================

VRRP track on serial

VRRP track on serial interface



============================

hostname R1

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 192.168.1.250 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 192.168.1.254

 vrrp 1 priority 110

 vrrp 1 authentication md5 key-string 123

 vrrp 1 track 1 decrement 50

!

interface Serial1/0

 ip address 10.1.1.1 255.255.255.252

 encapsulation ppp

!

router ospf 1

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

end

============================

============================

hostname R2

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 192.168.1.251 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 192.168.1.254

 vrrp 1 priority 100

 vrrp 1 authentication md5 key-string 123

 vrrp 1 track 1 decrement 50

!

interface Serial1/0

 ip address 10.1.2.1 255.255.255.252

 encapsulation ppp

!

router ospf 1

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 192.168.1.0 0.0.0.255 area 0.0.0.0

!

end

============================

============================

hostname R3

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 172.22.0.250 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 172.22.0.254

 vrrp 1 priority 110

 vrrp 1 authentication md5 key-string 123

 vrrp 1 track 1 decrement 50

!

interface Serial1/0

 ip address 10.1.1.2 255.255.255.252

 encapsulation ppp

!

router ospf 1

 network 10.1.1.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

end

============================

============================

hostname R4

!

track 1 interface Serial1/0 line-protocol

!

interface FastEthernet0/0

 ip address 172.22.0.251 255.255.255.0

 duplex auto

 speed auto

 vrrp 1 ip 172.22.0.254

 vrrp 1 priority 100

 vrrp 1 authentication md5 key-string 123

 vrrp 1 track 1 decrement 50

!

interface Serial1/0

 ip address 10.1.2.2 255.255.255.252

 encapsulation ppp

!

router ospf 1

 network 10.1.2.0 0.0.0.3 area 0.0.0.0

 network 172.22.0.0 0.0.0.255 area 0.0.0.0

!

end

============================