ESM connection bonding allows two Layer 2 access connections, for example, GTP and PPPoE, to combine to share a single Layer 3 IP connection. This allows the seamless use of two connections for additional bandwidth or resiliency without the need to manage multiple IP addresses.
SR OS spreads downstream traffic, either based on fixed weights, a filter decision, a pure active/standby, or dynamic load-balancing that attempts to saturate one link before using another link. Upstream traffic can enter through either connection, but it is recommended to keep flows identified by 5-tuple on the same link to avoid reordering.
Connection bonding requires an FPE type of sub-mgmt-extensions.