API Guide

● To reduce traffic loss when a VLT peer boots up and joins an existing VLT domain, or when the VLTi links fails and the VLT
peer is still up as detected by the VLT heartbeat, create an uplink state group. Configure all access VLT port channels on the
peer as upstream links. Configure all network-facing links as downstream link. For example:
OS10(config)# uplink-state-group 1
OS10(conf-uplink-state-group-1)# enable
OS10(conf-uplink-state-group-1)# downstream ethernet1/1/1-1/1/2
OS10(conf-uplink-state-group-1)# upstream port-channel 10
L3 VXLAN route scaling
The S4100-ON series, S5200-ON series, S4048T-ON, S4248-ON series, and S6010-ON switches support native VxLAN routing
— routing in and out of tunnels (RIOT). RIOT requires dedicated hardware resources reserved for overlay routing. You cannot
use these dedicated resources for underlay routing.
Each overlay ARP entry requires a routing next-hop in the hardware to bind a destination tenant VM IP address to the
corresponding tenant VM MAC address and VNI. Each virtual-network interface assigned to an IP subnet requires a routing
interface in the hardware.
OS10 supports preset profiles to re-allocate the number of resources reserved for overlay ARP entries. The number of entries
reserved for each preset mode differs according to OS10 switch.
Table 77. Routing next-hops reserved on OS10 switches
OS10 Switch Overlay next-
hop entries
Underlay next-
hop entries
Overlay L3
RIF entries
Underlay L3 RIF entries
S41xx-ON series:
default-overlay-routing
disable-overlay-routing
balanced-overlay-routing
scaled-overlay-routing
—
4096
0
16384
24576
—
28672
32768
16384
8192
—
2048
0
6144
10240
—
10240
12288
6144
2048
S4048T-ON and S6010-
ON:
default-overlay-routing
disable-overlay-routing
balanced-overlay-routing
scaled-overlay-routing
—
8192
0
24576
40960
—
4096
49152
24576
8192
—
2048
49152
24576
8192
—
2048
0
6144
10240
S52xx-ON series:
default-overlay-routing
disable-overlay-routing
balanced-overlay-routing
scaled-overlay-routing
—
8192
0
32768
53248
—
57344
65536
32768
12288
—
2048
0
8192
12288
—
14336
16384
8192
4096
S4248-ON:
default-overlay-routing
—
20480
—
110592
—
4096
—
28672
NOTE: The S4248-ON switch supports only one default profile to reserve resources for overlay ARP entries.
To activate the profile after you configure an overlay routing profile, save the configuration and reload the switch.
Configure an overlay routing profile
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VXLAN