scmp: export SCMP to controlplane draft #87
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nicorusti
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Dec 2, 2024
nicorusti
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nicorusti
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| ## Link Failure Notification - SCMP {#link-down-notification} | ||
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| In SCION, an intermediate router cannot change the path followed by a packet, only the source endpoint can chose a different path. Therefore, to enable fast recovery, a router SHOULD signal forwarding failures to the source, via a [SCMP notification](#scmp-notification). This allows the source endpoint to quickly switch to a different path. | ||
| In SCION, an intermediate router cannot change the path followed by a packet, only the source endpoint can chose a different path. Therefore, to enable fast recovery, a router SHOULD signal forwarding failures to the source, via a SCMP notification (see {{I-D.dekater-scion-controlplane}} section "SCMP/Error Messages"). This allows the source endpoint to quickly switch to a different path. | ||
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| Sending an SCMP error notification is OPTIONAL. Endpoints should therefore implement additional mechanisms to validate or detect link down signals. To reduce exposure to denial-of-service attacks, SCION routers SHOULD employ rate limiting when sending recommended SCMP notifications (especially identical ones). Rate limit policies are up to each AS' administrator. |
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Should this section go to the CP?
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Also, in passing:
Resolves: #84
Resolves: #86