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git-virl-hs-fulda/GIT-VIRL-HS-Fulda/Advanced Computer Networks .../advcompnet-lab4-bgp.txt

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Christoph Hardegen: changed LACP to mode active in DCN lab, added labs for BGP fabric and VXLAN
8 years ago
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  1. BGP configuration considerations:
  2. - subdivide single "public" AS (100) into multiple internal sub-AS (BGP confederation)
  3. - spine layer: all switches reside in one AS (65000)
  4. - leaf layer: every switch resides in its own AS (65001, 65002, 65003, 65004)
  5. - direct static peering between leaf and spine nodes (interfaces of interconnection network, no loopbacks)
  6. - allow load balancing across multiple BGP paths with equal costs (=> ECMP)
  7. - maximum path count equals number of used spine switches
  8. - only one AS at spine layer => no BGP multipath relaxing necessary
  9. - every BGP router is used as next hop in its advertised/forwarded routing messages
  13. ip subnet for l3-switch interconnection networks: 10.20.30.0/27
  14. -------------------------------------------------
  15. 10.20.30.0/30 veos-leaf-1 <> veos-spine-1
  16. .1 veos-spine-1 Ethernet1
  17. .2 veos-leaf-1 Ethernet1
  19. 10.20.30.4/30 veos-leaf-1 <> veos-spine-2
  20. .5 veos-spine-2 Ethernet1
  21. .6 veos-leaf-1 Ethernet2
  23. 10.20.30.8/30 veos-leaf-2 <> veos-spine-1
  24. .9 veos-spine-1 Ethernet2
  25. .10 veos-leaf-2 Ethernet1
  27. 10.20.30.12/30 veos-leaf-2 <> veos-spine-2
  28. .13 veos-spine-2 Ethernet2
  29. .14 veos-leaf-2 Ethernet2
  31. 10.20.30.16/30 veos-leaf-3 <> veos-spine-1
  32. .17 veos-spine-1 Ethernet3
  33. .18 veos-leaf-3 Ethernet1
  35. 10.20.30.20/30 veos-leaf-3 <> veos-spine-2
  36. .21 veos-spine-2 Ethernet3
  37. .22 veos-leaf-3 Ethernet2
  39. 10.20.30.24/30 veos-leaf-4 <> veos-spine-1
  40. .25 veos-spine-1 Ethernet4
  41. .26 veos-leaf-4 Ethernet1
  43. 10.20.30.28/30 veos-leaf-4 <> veos-spine-2
  44. .29 veos-spine-2 Ethernet4
  45. .30 veos-leaf-4 Ethernet2
  49. l3-switch networks/ip subnets:
  50. (advertised using BGP)
  51. -------------------------------------------------
  52. veos-leaf-1
  53. 172.23.24.0/24
  55. veos-leaf-1 Ethernet3 172.23.24.1
  56. lxc-iperf-1 172.23.24.10
  59. veos-leaf-2
  60. 172.23.25.0/24
  62. veos-leaf-2 Ethernet3 172.23.25.1
  63. lxc-iperf-2 172.23.25.10
  66. veos-leaf-3
  67. 172.23.26.0/24
  69. veos-leaf-3 Ethernet3 172.23.26.1
  70. lxc-iperf-3 172.23.26.10
  73. veos-leaf-4
  74. 172.23.27.0/24
  76. veos-leaf-4 Ethernet3 172.23.27.1
  77. lxc-iperf-4 172.23.27.10