Impact analysis

This document describes the impact of various changes to the system. The impact is described for configuration changes and manual container restarts and is split into the following categories:

• Impact on SCION data-plane traffic: SCION data-plane traffic refers to all traffic that is sent as SCION packets. This also includes IP-in-SCION tunneling traffic, which is a specific type of SCION data-plane traffic.
• Impact on SCION control-plane traffic: SCION control-plane traffic refers to all traffic that is sent as part of the SCION control-plane, such as beaconing, path discovery, and control-plane crypto exchanges.
• Impact on IP-in-SCION tunneling traffic: IP-in-SCION tunneling traffic refers to all traffic that is sent as part of the IP-in-SCION tunneling, which means IP traffic from the LAN that gets tunneled into SCION.

Configuration changes

Config section	Config change	SCION data-plane traffic	SCION control-plane traffic	IP-in-SCION tunneling traffic
BGP (config.bgp)	Any	No	No	Potentially interrupted
Cluster (config.cluster)	Any	Potentially interrupted	Potentially interrupted	Potentially interrupted
Interfaces (config.interfaces)	Modification of physical interface	Interrupted	Interrupted	Interrupted
	Any other interface change	No	No	No
Management (config.management)	Any	No	No	No
NAT (config.nat)	Any	No	No	Interrupted
SCION (config.scion)	Any	No	Potentially interrupted	No
SCION tunneling (config.scion_tunneling)	Any	No	No	Potentially interrupted
System (config.system)	DNS, NTP	No	No	No
	VPP, Kernel	Interrupted	Interrupted	Interrupted

Container restarts

Container	SCION data-plane traffic	SCION control-plane traffic	IP-in-SCION tunneling traffic
dataplane	Interrupted	Interrupted	Interrupted
dataplane-control	No	No	No
router	No	No	No
dispatcher	No	Interrupted (prior to v0.39.0)	Interrupted (prior to v0.39.0)
control	No	Interrupted	No
daemon	No	No	No
gateway	No	No	No
frr	No	No	Interrupted
appliance-controller	No	No	No
appliance-cron	No	No	No