On 9/23/21 1:38 AM, Leonard Crestez wrote: > On 9/22/21 11:23 PM, Francesco Ruggeri wrote: >> On Tue, Sep 21, 2021 at 9:15 AM Leonard Crestez <cdleonard@xxxxxxxxx> >> wrote: >>> * Sequence Number Extension not implemented so connections will flap >>> every ~4G of traffic. >> >> Could you expand on this? >> What exactly do you mean by flap? Will the connection be terminated? >> I assume that depending on the initial sequence numbers the first flaps >> may occur well before 4G. >> Do you use a SNE of 0 in the hash computation, or do you just not include >> the SNE in it? > > SNE is hardcoded to zero, with the logical consequence of incorrect > signatures on sequence number wrapping. The SNE has to be included > because otherwise all signatures would be invalid. > > You are correct that this can break much sooner than 4G of traffic, but > still in the GB range on average. I didn't test the exact behavior (not > clear how) but if signatures don't validate the connection will likely > timeout. > This is for BGP and LDP connections. What's the expected frequency of rollover for large FIBs? Seems like it could be fairly often.
