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©2016 RHC Technologies R H C TECHNOLOGIES #2016 #LIKE #FOLLOW #WATCH BGP Route Aggregation LAB WORKBOOK Prepared By Sai Linn Thu

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Page 1: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

R H C TECHNOLOGIES #2016

#LIKE #FOLLOW #WATCH

BGP Route Aggregation LAB WORKBOOK

Prepared By Sai Linn Thu

Page 2: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

R H C TECHNOLOGIES #2016

#LIKE #FOLLOW #WATCH

R5   R6  

R1  

R3   R4  

R2  

Fa0/0

Fa0/0

Fa1/0 Fa1/0 Fa1/0 Fa1/0

Fa1/0

Fa2/0 Fa3/0

Fa4/0

Page 3: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 1 – IP Address Assignment

R1  (  AS  100  )   R2  (  AS  200  )   R3  (  AS  300  )   R4  (  AS  400  )  configure terminal int F0/0 ip add 10.1.12.1 255.255.255.0 !

configure terminal int F0/0 ip add 10.1.12.2 255.255.255.0 int F1/0 ip add 10.1.23.2 255.255.255.0 int F2/0 ip add 10.1.24.2 255.255.255.0 int F3/0 ip add 10.1.25.2 255.255.255.0 int F4/0 ip add 10.1.26.2 255.255.255.0 !

configure terminal int F1/0 ip add 10.1.23.3 255.255.255.0 ! int lo0 ip add 192.168.0.1 255.255.255.0 int lo1 ip add 192.168.1.1 255.255.255.0 int lo2 ip add 192.168.2.1 255.255.255.0 !

configure terminal int F1/0 ip add 10.1.24.4 255.255.255.0 ! int lo0 ip add 192.168.3.1 255.255.255.0 int lo1 ip add 192.168.4.1 255.255.255.0 int lo2 ip add 192.168.5.1 255.255.255.0 !

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R5  (  AS  500  )   R6  (  AS  600  )  configure terminal int F1/0 ip add 10.1.25.5 255.255.255.0 ! int lo0 ip add 192.168.6.1 255.255.255.0 int lo1 ip add 192.168.7.1 255.255.255.0 int lo2 ip add 192.168.8.1 255.255.255.0 !

configure terminal int F1/0 ip add 10.1.26.6 255.255.255.0 ! int lo0 ip add 192.168.9.1 255.255.255.0 int lo1 ip add 192.168.10.1 255.255.255.0 int lo2 ip add 192.168.11.1 255.255.255.0 !

Page 4: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 2 – Configure eBGP

R1  (  AS  100  )   R2  (  AS  200  )  configure terminal router bgp 100 nei 10.1.12.2 remote-as 200 !

configure terminal router bgp 200 nei 10.1.12.1 remote-as 100 nei 10.1.23.3 remote-as 300 nei 10.1.24.4 remote-as 400 nei 10.1.25.5 remote-as 500 nei 10.1.26.6 remote-as 600 !

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R5  (  AS  500  )   R6  (  AS  600  )  router bgp 500 nei 10.1.25.2 remote-as 200 net 192.168.6.0 mask 255.255.255.0 net 192.168.7.0 mask 255.255.255.0 net 192.168.8.0 mask 255.255.255.0 !

router bgp 600 nei 10.1.26.2 remote-as 200 net 192.168.9.0 mask 255.255.255.0 net 192.168.10.0 mask 255.255.255.0 net 192.168.11.0 mask 255.255.255.0 !

R3  (  AS  300  )   R4  (  AS  400  )  router bgp 300 nei 10.1.23.2 remote-as 200 net 192.168.0.0 mask 255.255.255.0 net 192.168.1.0 mask 255.255.255.0 net 192.168.2.0 mask 255.255.255.0 !

router bgp 400 nei 10.1.24.2 remote-as 200 net 192.168.3.0 mask 255.255.255.0 net 192.168.4.0 mask 255.255.255.0 net 192.168.5.0 mask 255.255.255.0 !

Page 5: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 2 – eBGP Verification ( R2 )

R2  (  AS  200  )  R2#sh ip bgp summary BGP router identifier 10.1.26.2, local AS number 200 BGP table version is 13, main routing table version 13 12 network entries using 1776 bytes of memory 12 path entries using 768 bytes of memory 4/4 BGP path/bestpath attribute entries using 544 bytes of memory 4 BGP AS-PATH entries using 96 bytes of memory 0 BGP route-map cache entries using 0 bytes of memory 0 BGP filter-list cache entries using 0 bytes of memory BGP using 3184 total bytes of memory BGP activity 12/0 prefixes, 12/0 paths, scan interval 60 secs Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.1.12.1 4 100 4 8 13 0 0 00:00:37 0 10.1.23.3 4 300 5 8 13 0 0 00:01:15 3 10.1.24.4 4 400 5 8 13 0 0 00:01:14 3 10.1.25.5 4 500 5 8 13 0 0 00:01:01 3 10.1.26.6 4 600 5 8 13 0 0 00:01:06 3 R2#

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Page 6: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 2 – BGP Table Verification ( R2 )

R2  (  AS  200  )  R2#show ip bgp BGP table version is 13, local router ID is 10.1.26.2 Network Next Hop Metric LocPrf Weight Path *> 192.168.0.0 10.1.23.3 0 0 300 i *> 192.168.1.0 10.1.23.3 0 0 300 i *> 192.168.2.0 10.1.23.3 0 0 300 i *> 192.168.3.0 10.1.24.4 0 0 400 i *> 192.168.4.0 10.1.24.4 0 0 400 i *> 192.168.5.0 10.1.24.4 0 0 400 i *> 192.168.6.0 10.1.25.5 0 0 500 i *> 192.168.7.0 10.1.25.5 0 0 500 i *> 192.168.8.0 10.1.25.5 0 0 500 i *> 192.168.9.0 10.1.26.6 0 0 600 i *> 192.168.10.0 10.1.26.6 0 0 600 i *> 192.168.11.0 10.1.26.6 0 0 600 i R2#

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Page 7: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 3 – Aggregate & Analyze ( R2 )

R2  (  AS  200  )  router bgp 200 aggregate-address 192.168.0.0 255.255.240.0 !

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R2 ( AS 200 ) R2#show ip bgp BGP table version is 16, local router ID is 10.1.26.2 Network Next Hop Metric LocPrf Weight Path *> 192.168.0.0 10.1.23.3 0 0 300 i *> 192.168.0.0/20 0.0.0.0 32768 i *> 192.168.1.0 10.1.23.3 0 0 300 i *> 192.168.2.0 10.1.23.3 0 0 300 i *> 192.168.3.0 10.1.24.4 0 0 400 i *> 192.168.4.0 10.1.24.4 0 0 400 i *> 192.168.5.0 10.1.24.4 0 0 400 i *> 192.168.6.0 10.1.25.5 0 0 500 i *> 192.168.7.0 10.1.25.5 0 0 500 i *> 192.168.8.0 10.1.25.5 0 0 500 i *> 192.168.9.0 10.1.26.6 0 0 600 i *> 192.168.10.0 10.1.26.6 0 0 600 i *> 192.168.11.0 10.1.26.6 0 0 600 i R2#

Page 8: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 3 – Analyze BGP Table ( R1 )

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R1 ( AS 100 ) R1#show ip bgp Network Next Hop Metric LocPrf Weight Path *> 192.168.0.0 10.1.12.2 0 200 300 i *> 192.168.0.0/20 10.1.12.2 0 0 200 i *> 192.168.1.0 10.1.12.2 0 200 300 i *> 192.168.2.0 10.1.12.2 0 200 300 i *> 192.168.3.0 10.1.12.2 0 200 400 i *> 192.168.4.0 10.1.12.2 0 200 400 i *> 192.168.5.0 10.1.12.2 0 200 400 i *> 192.168.6.0 10.1.12.2 0 200 500 i *> 192.168.7.0 10.1.12.2 0 200 500 i *> 192.168.8.0 10.1.12.2 0 200 500 i *> 192.168.9.0 10.1.12.2 0 200 600 i *> 192.168.10.0 10.1.12.2 0 200 600 i *> 192.168.11.0 10.1.12.2 0 200 600 i R1#

Page 9: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 4 – Aggregate summary-only & Analyze ( R2 )

R2  (  AS  200  )  router bgp 200 aggregate-address 192.168.0.0 255.255.240.0 summary-only !

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R2 ( AS 200 ) R2#show ip bgp BGP table version is 28, local router ID is 10.1.26.2 Status codes: s suppressed Network Next Hop Metric LocPrf Weight Path s> 192.168.0.0 10.1.23.3 0 0 300 i *> 192.168.0.0/20 0.0.0.0 32768 i s> 192.168.1.0 10.1.23.3 0 0 300 i s> 192.168.2.0 10.1.23.3 0 0 300 i s> 192.168.3.0 10.1.24.4 0 0 400 i s> 192.168.4.0 10.1.24.4 0 0 400 i s> 192.168.5.0 10.1.24.4 0 0 400 i s> 192.168.6.0 10.1.25.5 0 0 500 i s> 192.168.7.0 10.1.25.5 0 0 500 i s> 192.168.8.0 10.1.25.5 0 0 500 i s> 192.168.9.0 10.1.26.6 0 0 600 i s> 192.168.10.0 10.1.26.6 0 0 600 i s> 192.168.11.0 10.1.26.6 0 0 600 i R2#

Page 10: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 4 – Analyze BGP Table & Routing Table ( R1 )

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R1 ( AS 100 ) R1#show ip bgp BGP table version is 28, local router ID is 10.1.12.1 Network Next Hop Metric LocPrf Weight Path *> 192.168.0.0/20 10.1.12.2 0 0 200 i R1#

R1 ( AS 100 ) R1#show ip route bgp B 192.168.0.0/20 [20/0] via 10.1.12.2, 00:21:22 R1#

R1 ( AS 100 ) R1#sh ip bgp 192.168.0.0/20 BGP routing table entry for 192.168.0.0/20, version 16 Paths: (1 available, best #1, table default) Not advertised to any peer Refresh Epoch 1 200, (aggregated by 200 10.1.26.2) 10.1.12.2 from 10.1.12.2 (10.1.26.2) Origin IGP, metric 0, localpref 100, valid, external, atomic-aggregate, best R1#

Page 11: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 5 – Generate as-set path information ( R2 )

R2 ( AS 200 ) router bgp 200 aggregate-address 192.168.0.0 255.255.240.0 summary-only as-set !

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R2 ( AS 200 ) R2#show ip bgp BGP table version is 29, local router ID is 10.1.26.2 Network Next Hop Metric LocPrf Weight Path s> 192.168.0.0 10.1.23.3 0 0 300 i *> 192.168.0.0/20 0.0.0.0 100 32768 {300,400,500,600} i s> 192.168.1.0 10.1.23.3 0 0 300 i s> 192.168.2.0 10.1.23.3 0 0 300 i s> 192.168.3.0 10.1.24.4 0 0 400 i s> 192.168.4.0 10.1.24.4 0 0 400 i s> 192.168.5.0 10.1.24.4 0 0 400 i s> 192.168.6.0 10.1.25.5 0 0 500 i s> 192.168.7.0 10.1.25.5 0 0 500 i s> 192.168.8.0 10.1.25.5 0 0 500 i s> 192.168.9.0 10.1.26.6 0 0 600 i s> 192.168.10.0 10.1.26.6 0 0 600 i s> 192.168.11.0 10.1.26.6 0 0 600 i R2#

Page 12: BGP Route Aggregation Lab WorkBook

©2016 RHC Technologies

Step 5 – Analyze BGP Table & Routing Table ( R1 )

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R1 ( AS 100 ) R1#show ip bgp BGP table version is 29, local router ID is 10.1.12.1 Network Next Hop Metric LocPrf Weight Path *> 192.168.0.0/20 10.1.12.2 0 0 200 {300,400,500,600} i

R1 ( AS 100 ) R1#show ip route bgp B 192.168.0.0/20 [20/0] via 10.1.12.2, 00:21:22 R1#

R1 ( AS 100 ) R1#show ip bgp 192.168.0.0/20 BGP routing table entry for 192.168.0.0/20, version 29 Paths: (1 available, best #1, table default) Not advertised to any peer Refresh Epoch 1 200 {300,400,500,600}, (aggregated by 200 10.1.26.2) 10.1.12.2 from 10.1.12.2 (10.1.26.2) Origin IGP, metric 0, localpref 100, valid, external, best R1#

Page 13: BGP Route Aggregation Lab WorkBook

© www.rhctechnologies.com

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