************************************ Workbook Labs 11 - 22 (12) ************************************ ******************************************************************************* Lab # 1 - Configuring the Base Topology - eBGP , iBGP and IGP as an Underlap ******************************************************************************* +++++++++++++++++++++++++++++++++++++++++++ 1. eBGP between AS 100 & AS 12 +++++++++++++++++++++++++++++++++++++++++++ ----- R10 ----- router bgp 100 network 1.10.1.0 mask 255.255.255.0 network 1.10.2.0 mask 255.255.255.0 neighbor 192.1.110.1 remote-as 12 neighbor 192.1.120.2 remote-as 12 ----- R1 ----- router bgp 12 network 1.1.1.0 mask 255.255.255.0 network 1.1.2.0 mask 255.255.255.0 neighbor 192.1.110.10 remote-as 100 ----- R2 ----- router bgp 12 network 1.2.1.0 mask 255.255.255.0 network 1.2.2.0 mask 255.255.255.0 neighbor 192.1.120.10 remote-as 100 +++++++++++++++++++++++++++++++++++++++++++ 2. iBGP within AS 12 +++++++++++++++++++++++++++++++++++++++++++ ----- R1 ----- Interface Loopback 10 ip address 192.168.1.1 255.255.255.255 ! router eigrp 12 network 192.168.12.0 network 192.168.1.0 ! router bgp 12 neighbor 192.168.1.2 remote-as 12 neighbor 192.168.1.2 update-source Loopback10 neighbor 192.168.1.2 next-hop-self ----- R2 ----- Interface Loopback 10 ip address 192.168.1.2 255.255.255.255 ! router eigrp 12 network 192.168.12.0 network 192.168.1.0 ! router bgp 12 neighbor 192.168.1.1 remote-as 12 neighbor 192.168.1.1 update-source Loopback10 neighbor 192.168.1.1 next-hop-self +++++++++++++++++++++++++++++++++++++++++++ 3. eBGP between AS 1000 & AS 12 +++++++++++++++++++++++++++++++++++++++++++ ----- R1 ----- router bgp 12 neighbor 192.1.13.3 remote-as 1000 ----- R2 ----- router bgp 12 neighbor 192.1.24.4 remote-as 1000 ----- R3 ----- router bgp 1000 network 1.3.1.0 mask 255.255.255.0 network 1.3.2.0 mask 255.255.255.0 neighbor 192.1.13.1 remote-as 12 ----- R4 ----- router bgp 1000 network 1.4.1.0 mask 255.255.255.0 network 1.4.2.0 mask 255.255.255.0 neighbor 192.1.24.2 remote-as 12 +++++++++++++++++++++++++++++++++++++++++++ 4. iBGP within AS 1000 +++++++++++++++++++++++++++++++++++++++++++ ----- R3 ----- router bgp 1000 neighbor 192.168.34.4 remote-as 1000 neighbor 192.168.34.4 next-hop-self neighbor 192.168.34.4 route-reflector-client neighbor 192.168.35.5 remote-as 1000 neighbor 192.168.35.5 next-hop-self neighbor 192.168.35.5 route-reflector-client ----- R4 ----- router bgp 1000 neighbor 192.168.34.3 remote-as 1000 neighbor 192.168.34.3 next-hop-self ----- R5 ----- router bgp 1000 network 1.5.1.0 mask 255.255.255.0 network 1.5.2.0 mask 255.255.255.0 neighbor 192.168.35.3 remote-as 1000 neighbor 192.168.35.3 next-hop-self +++++++++++++++++++++++++++++++++++++++++++ 5. Internal IGP in AS 1000 between R3 & R6 +++++++++++++++++++++++++++++++++++++++++++ ----- R3 ----- router ospf 1 router-id 0.0.0.3 network 192.168.36.0 0.0.0.255 area 0 redistribute bgp 1000 ! router bgp 1000 redistribute ospf 1 ----- R6 ----- router ospf 1 router-id 0.0.0.6 network 192.168.36.0 0.0.0.255 area 0 network 1.6.0.0 0.0.255.255 area 0 +++++++++++++++++++++++++++++++++++++++++++ 6. eBGP between AS 1000 & AS 2000 +++++++++++++++++++++++++++++++++++++++++++ ----- R4 ----- router bgp 1000 neighbor 192.1.47.7 remote-as 2000 neighbor 192.1.48.8 remote-as 2000 ----- R7 ----- router bgp 2000 network 1.7.1.0 mask 255.255.255.0 network 1.7.2.0 mask 255.255.255.0 neighbor 192.1.47.4 remote-as 1000 ----- R8 ----- router bgp 2000 network 1.8.1.0 mask 255.255.255.0 network 1.8.2.0 mask 255.255.255.0 neighbor 192.1.48.4 remote-as 1000 +++++++++++++++++++++++++++++++++++++++++++ 7. iBGP within AS 2000 +++++++++++++++++++++++++++++++++++++++++++ ----- R7 ----- router eigrp 2000 network 192.168.79.0 network 10.7.7.0 0.0.0.255 ! router bgp 2000 neighbor 10.9.9.9 remote-as 2000 neighbor 10.9.9.9 update-source Loopback10 neighbor 10.9.9.9 next-hop-self ----- R8 ----- router eigrp 2000 network 192.168.89.0 network 10.8.8.0 0.0.0.255 ! router bgp 2000 neighbor 10.9.9.9 remote-as 2000 neighbor 10.9.9.9 update-source Loopback10 neighbor 10.9.9.9 next-hop-self ----- R9 ----- router eigrp 2000 network 192.168.79.0 network 192.168.89.0 network 10.9.9.0 0.0.0.255 ! router bgp 2000 network 1.9.1.0 mask 255.255.255.0 network 1.9.2.0 mask 255.255.255.0 neighbor IBGP peer-group neighbor IBGP remote-as 2000 neighbor IBGP update-source Loopback10 neighbor IBGP next-hop-self neighbor IBGP route-reflector-client neighbor 10.7.7.7 peer-group IBGP neighbor 10.8.8.8 peer-group IBGP +++++++++++++++++++++++++++++++++++++++++++ 8. eBGP between AS 110 & AS 2000 +++++++++++++++++++++++++++++++++++++++++++ ----- R9 ----- router bgp 2000 neighbor 192.1.190.11 remote-as 110 ----- R11 ----- router bgp 110 network 1.11.1.0 mask 255.255.255.0 network 1.11.2.0 mask 255.255.255.0 neighbor 192.1.190.9 remote-as 2000 ******************************************************************************* Lab # 2 - Redistributing IBGP into IGP ******************************************************************************* ----- R3 ----- router bgp 1000 bgp redistribute-internal ******************************************************************************* Lab # 3 - Changing the Next-hop for reflected routes ******************************************************************************* ----- R3 ----- router bgp 1000 neighbor 192.168.34.4 next-hop-self all neighbor 192.168.35.5 next-hop-self all ******************************************************************************* Lab # 4 - Load Balancing (ECMP) with BGP ******************************************************************************* +++++++++++++++++++++++++++++++++++++++++++++++++ ECMP between AS 100 & AS 12 +++++++++++++++++++++++++++++++++++++++++++++++++ ----- R10 ----- router bgp 100 maximum-paths 2 +++++++++++++++++++++++++++++++++++++++++++++++++ ECMP - iBGP Paths +++++++++++++++++++++++++++++++++++++++++++++++++ ----- R9 ----- router bgp 100 maximum-paths ibgp 2 +++++++++++++++++++++++++++++++++++++++++++++++++ ECMP - with eBGP & iBGP Paths +++++++++++++++++++++++++++++++++++++++++++++++++ ----- R3 ----- router bgp 100 maximum-paths ibgp 2 ******************************************************************************* Lab # 5 - Attributes - Local Preference ******************************************************************************* Note: -> If you would like to control OUTBOUND TRAFFIC, set the attribute on the INCOMING ROUTE -> If you would like to control INBOUND TRAFFIC, set the attribute on the OUTGOING ROUTE Local Preference: ----------------- -> It is a Standard Attribute. -> It is used to control OUTBOUND Traffic leaving your AS. (Traffic meant for Remote Networks) -> It is a number. -> Higher the Better. -> The default Local Preference is 100. -> It is set on the INCOMING Route. Requirement: AS 2000 wants to use the R4-R7 link as the preferred exit towards routes learnt from AS 1000. ----- R7 ----- route-map SETLP set local-preference 111 ! router bgp 2000 neighbor 192.1.47.4 route-map SETLP in ******************************************************************************* Lab # 6 - Attributes - MED (Metric) ******************************************************************************* MED: ----------------- -> It is a Standard Attribute. -> It is used to control INBOUND Traffic entering your AS. (Traffic meant for Routes Propagated by you) -> It is a number like a Cost -> Lower the Better. -> The default MED/Metric is 0. -> It is set on the OUTGOING Route(s). Requirement: AS 2000 wants to use the R4-R8 link as the preferred entry from AS 1000. ----- R7 ----- route-map SETMED set metric 77 ! router bgp 2000 neighbor 192.1.47.4 route-map SETMED out ******************************************************************************* Lab # 7 - Attributes - WEIGHT ******************************************************************************* WEIGHT: ----------------- -> It is a Cisco Prop. -> It is used to control OUTBOUND Traffic leaving your Router. It is local to the router. -> It is a number. -> Higher the Better. -> The default Weight is 0 for any remote route. -> It is set on the Incoming Route(s). Requirement: AS 2000 wants to use the R4-R8 link as the preferred entry from AS 1000. ----- R7 ----- route-map SETWT set metric 88 ! router bgp 2000 neighbor 192.1.47.4 route-map SETWT in ******************************************************************************* Lab # 8 - Attributes - AS PATH ******************************************************************************* AS Path: ----------------- -> It is a Standard Attribute -> It is used to control INBOUND & OUTBOUND Traffic. -> It is like a Hop Count (AS-Hop Count). -> Shorter the Better. -> It is set on the Incoming Route(s) to control Outbound Traffic. Set the AS-Path prepend to the Neighbor AS. -> It is set on the Outgoing Route(s) to control Inbound Traffic. Set the AS-Path prepend to the Local AS. ----- R7 ----- no route-map SETMED no route-map SETLP ! router bgp 2000 no neighbor 192.1.47.4 route-map SETLP in no neighbor 192.1.47.4 route-map SETMED out ----- R8 ----- no route-map SETWT ! router bgp 2000 no neighbor 192.1.48.4 route-map SETWT in Requirement: AS 2000 wants to use the R4-R7 link as the preferred entry from AS 1000. AS 2000 wants to use the R4-R8 link as the preferred exit towards routes learnt from AS 1000. ++++++++++++++++++++++++++++++++++ Control Inbound via R7 ++++++++++++++++++++++++++++++++++ ----- R8 ----- route-map SETAS set as-path prepend 2000 ! router bgp 2000 neighbor 192.1.48.4 route-map SETAS out ++++++++++++++++++++++++++++++++++ Control Outbound via R8 ++++++++++++++++++++++++++++++++++ ----- R7 ----- route-map SETAS set as-path prepend 1000 ! router bgp 2000 neighbor 192.1.47.4 route-map SETAS in Weight -> Local Preference -> AS-Path -> MED ******************************************************************************* Lab # 9 - Attributes - No-Export ******************************************************************************* Requirement: AS 110 routes should not be propagated beyond AS 2000. ----- R11 ----- route-map ABC set community no-export ! router bgp 110 neighbor 192.1.190.9 route-map ABC out ******************************************************************************* Lab # 10 - Attributes - No-Advertise ******************************************************************************* Requirement: AS 110 routes should not be propagated beyond R9. ----- R11 ----- route-map ABC no set community no-export set community no-advertise ******************************************************************************* Lab # 11 - Conditional Advertisement ******************************************************************************* Requirement: R8 should advertise the 1.7.0.0/16, 1.8.0.0/16 & 1.9.0.0/16 routes in case R7 is not reachable. ----- R7 ----- interface loopback 99 ip address 192.168.7.7 255.255.255.255 ! router bgp 2000 network 192.168.7.7 mask 255.255.255.255 ----- R8 ----- access-list 1 permit 1.7.0.0 0.0.255.255 access-list 1 permit 1.8.0.0 0.0.255.255 access-list 1 permit 1.9.0.0 0.0.255.255 ! access-list 2 permit 192.168.7.7 0.0.0.0 ! route-map R7-LINK match ip address 2 ! route-map NETS match ip address 1 ! router bgp 2000 neighbor 192.1.48.4 advertise-map NETS non-exist-map R7-LINK