Network requirements
.. Switch A and SwitchB located within AS 200, AS200 using the OSPF as the IGP.
.. SwitchC, Switch D and SwitchE located in AS100, the AS 100 used as the IGP OSPF.
.. Switch B and SwitchC EBGP connection, and configure BGP direct routes OSPF, BGP routes OSPF process is introduced.
.. In order to reduce the size of the routing table of SwitchA on SwitchB. Configure route summarization, only the summary route 10.0.0.0/8. 
A: Specifies the IP address of the
two: the OSPF Configuration
1 Configuration SwitchA 
2. Configuration SwitchB 
. 3 arranged SwitchC 
. 4 arranged SwitchD 
. 5 configuration SwitchE 
three: Configure BGP, and the introduction of direct routes OSP
1 SwitchB Configuration 
2 Configuration SwitchC 
four: the Switch and SwitchB Configuring OSPF BGP route
1 arranged OSPF into BGP routes on SwitchB 
2SwitchC above
3 SwitchA view route information
Four aggregation routing configuration on SwitchB, only advertises routes gathering 10.0.0.0/8 
check the routing table