rfc9747v2.txt | rfc9747.txt | |||
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skipping to change at line 252 ¶ | skipping to change at line 252 ¶ | |||
by default on hosts. The method for provisioning device B to loop | by default on hosts. The method for provisioning device B to loop | |||
back Unaffiliated BFD Echo packets is outside the scope of this | back Unaffiliated BFD Echo packets is outside the scope of this | |||
document. | document. | |||
Similar to what's specified in [RFC5880], the Unaffiliated BFD Echo | Similar to what's specified in [RFC5880], the Unaffiliated BFD Echo | |||
session begins with the periodic, slow transmission of Unaffiliated | session begins with the periodic, slow transmission of Unaffiliated | |||
BFD Echo packets. The slow transmission rate should be no greater | BFD Echo packets. The slow transmission rate should be no greater | |||
than one packet per second, until the session on device A is Up. | than one packet per second, until the session on device A is Up. | |||
After the session is Up, the provisioned transmission interval is | After the session is Up, the provisioned transmission interval is | |||
used. When the Unaffiliated BFD Echo session on device A goes Down, | used. When the Unaffiliated BFD Echo session on device A goes Down, | |||
the slow transmission rate is resumed. The "Detect Mult" defined in | the slow transmission rate is resumed. The "Detect Mult" field | |||
[RFC5880] MUST be set to a value provisioned on device A. When the | defined in [RFC5880] MUST be set to a value provisioned on device A. | |||
bfd.SessionState is Up and a "Detect Mult" number of Unaffiliated BFD | When the bfd.SessionState is Up and a "Detect Mult" number of | |||
Echo packets have not arrived at device A as they should, the device | Unaffiliated BFD Echo packets have not arrived at device A as they | |||
A "MUST set bfd.SessionState to Down and bfd.LocalDiag to 2 (Echo | should, the device A "MUST set bfd.SessionState to Down and | |||
Function Failed)", as specified in Section 6.8.5 of [RFC5880]. | bfd.LocalDiag to 2 (Echo Function Failed)", as specified in | |||
Section 6.8.5 of [RFC5880]. | ||||
In summary, the Unaffiliated BFD Echo packet reuses the format of the | In summary, the Unaffiliated BFD Echo packet reuses the format of the | |||
BFD Control packet defined in [RFC5880], and the fields within the | BFD Control packet defined in [RFC5880], and the fields within the | |||
Unaffiliated BFD Echo packet are populated as follows: | Unaffiliated BFD Echo packet are populated as follows: | |||
* My Discriminator: MUST be set to the provisioned local | * My Discriminator: MUST be set to the provisioned local | |||
discriminator. | discriminator. | |||
* Your Discriminator: MUST initially be set to 0, and then MUST be | * Your Discriminator: MUST initially be set to 0, and then MUST be | |||
set to the value of "My Discriminator" looped back from the remote | set to the value of "My Discriminator" looped back from the remote | |||
End of changes. 1 change blocks. | ||||
6 lines changed or deleted | 7 lines changed or added | |||
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