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77 lines
2.2 KiB
77 lines
2.2 KiB
BGP configuration considerations:
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- subdivide single "public" AS (100) into multiple internal sub-AS (BGP confederation)
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- spine layer: all switches reside in one AS (65000)
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- leaf layer: every switch resides in its own AS (65001, 65002, 65003, 65004)
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- direct static peering between leaf and spine nodes (interfaces of interconnection network, no loopbacks)
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- allow load balancing across multiple BGP paths with equal costs (=> ECMP)
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- maximum path count equals number of used spine switches
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- only one AS at spine layer => no BGP multipath relaxing necessary
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- every BGP router is used as next hop in its advertised/forwarded routing messages
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ip subnet for l3-switch interconnection networks: 10.20.30.0/27
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-------------------------------------------------
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10.20.30.0/30 veos-leaf-1 <> veos-spine-1
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.1 veos-spine-1 Ethernet1
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.2 veos-leaf-1 Ethernet1
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10.20.30.4/30 veos-leaf-1 <> veos-spine-2
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.5 veos-spine-2 Ethernet1
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.6 veos-leaf-1 Ethernet2
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10.20.30.8/30 veos-leaf-2 <> veos-spine-1
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.9 veos-spine-1 Ethernet2
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.10 veos-leaf-2 Ethernet1
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10.20.30.12/30 veos-leaf-2 <> veos-spine-2
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.13 veos-spine-2 Ethernet2
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.14 veos-leaf-2 Ethernet2
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10.20.30.16/30 veos-leaf-3 <> veos-spine-1
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.17 veos-spine-1 Ethernet3
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.18 veos-leaf-3 Ethernet1
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10.20.30.20/30 veos-leaf-3 <> veos-spine-2
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.21 veos-spine-2 Ethernet3
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.22 veos-leaf-3 Ethernet2
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10.20.30.24/30 veos-leaf-4 <> veos-spine-1
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.25 veos-spine-1 Ethernet4
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.26 veos-leaf-4 Ethernet1
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10.20.30.28/30 veos-leaf-4 <> veos-spine-2
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.29 veos-spine-2 Ethernet4
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.30 veos-leaf-4 Ethernet2
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l3-switch networks/ip subnets:
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(advertised using BGP)
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-------------------------------------------------
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veos-leaf-1
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172.23.24.0/24
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veos-leaf-1 Ethernet3 172.23.24.1
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lxc-iperf-1 172.23.24.10
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veos-leaf-2
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172.23.25.0/24
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veos-leaf-2 Ethernet3 172.23.25.1
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lxc-iperf-2 172.23.25.10
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veos-leaf-3
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172.23.26.0/24
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veos-leaf-3 Ethernet3 172.23.26.1
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lxc-iperf-3 172.23.26.10
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veos-leaf-4
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172.23.27.0/24
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veos-leaf-4 Ethernet3 172.23.27.1
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lxc-iperf-4 172.23.27.10
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