Point-to-point addresses
Point-to-point addresses
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All addresses come from the same base IP prefix, 192.168.0.0/16 with the third octet representing the spine number. For example, 192.168.1.0/31 is a two-host subnet connected to Spine 1 while 192.168.2.0/31 is connected to Spine 2. The /31 net mask is used to conserve IPs. This IP scheme is easily extended as leaf and spine switches are added to the network. Table 2 describes Layer 3 connection details for each leaf and spine switch.
Table 2. Interface and IP configuration
Link
Label
Source switch
Source interface
Source IP
Network
Destination switch
Destination interface
Destination IP
A
Leaf 1
Eth1/1/53
.1
192.168.1.0/31
Spine 1
Eth1/1/1
.0
B
Leaf 1
Eth1/1/54
.1
192.168.2.0/31
Spine 2
Eth1/1/1
.0
C
Leaf 2
Eth1/1/53
.3
192.168.1.2/31
Spine 1
Eth1/1/2
.2
D
Leaf 2
Eth1/1/54
.3
192.168.2.2/31
Spine 2
Eth1/1/2
.2
E
Leaf 3
Eth1/1/53
.5
192.168.1.4/31
Spine 1
Eth1/1/3
.4
F
Leaf 3
Eth1/1/54
.5
192.168.2.4/31
Spine 2
Eth1/1/3
.4
G
Leaf 4
Eth1/1/53
.7
192.168.1.6/31
Spine 1
Eth1/1/4
.6
H
Leaf 4
Eth1/1/54
.7
192.168.2.6/31
Spine 2
Eth1/1/4
.6
Note: Link labels A-D refer to S5248F switch ports in rack 1, while link labels E-H refer to S5248F switch ports in rack 2.
Figure 12. Point-to point IP addresses