RFC Errata
Found 3 records.
Status: Verified (1)
RFC 8239, "Data Center Benchmarking Methodology", August 2017
Source of RFC: bmwg (ops)
Errata ID: 5652
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Nikolai Malykh
Date Reported: 2019-03-12
Verifier Name: Warren Kumari (Ops AD)
Date Verified: 2019-09-06
Section 3.2 says:
o Last iteration: Ingress port N-2 sending line rate to egress port N-1, while port N is sending a known low amount of oversubscription traffic (1% recommended) with the same packet size to egress port N. Measure the buffer size value by multiplying the number of extra frames sent by the frame size.
It should say:
o Last iteration: Ingress port N-2 sending line rate to egress port N-1, while port N is sending a known low amount of oversubscription traffic (1% recommended) with the same packet size to egress port N-1. Measure the buffer size value by multiplying the number of extra frames sent by the frame size.
Notes:
Incorrect number of the output port for oversubscription traffic.
[WK]: See https://mailarchive.ietf.org/arch/msg/bmwg/_zZOrFmBwGq3dc5Pfb833tmLSGk for additional context.
Status: Reported (2)
RFC 8239, "Data Center Benchmarking Methodology", August 2017
Source of RFC: bmwg (ops)
Errata ID: 6763
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Leonard Yu
Date Reported: 2021-11-30
Section 3.2 says:
Last iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port N-3 and port N-2, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port.
It should say:
Last iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port N-4 and port N-3, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port.
Notes:
If
#1, 1->2, 3->4, 5->6, 7->8, ... and N-1->2, N->3
#2, 1->2, 3->4, 5->6, 7->8, ... and N-1->4, N->5
Then
#last, 1->2, 3->4, 5->6, 7->8, ... and N-1->N-4, N->N-3
Otherwise, the general equation won't satisfy #1 and #2
Errata ID: 6768
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Leonard Yu
Date Reported: 2021-12-01
Section 3.2 says:
3) Measure maximum port pair buffer sizes. o First iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port 2 and port 3, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port. o Second iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port 4 and port 5, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port. o Last iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port N-3 and port N-2, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port.
It should say:
3) Measure maximum port pair buffer sizes. o First iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port 1 and port 2, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port. o Second iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port 3 and port 4, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port. o Last iteration: Ingress port 1 sending line rate to egress port 2, ingress port 3 sending line rate to egress port 4, etc. Ingress port N-1 and port N will oversubscribe, at 1% of line rate, egress port N-3 and port N-2, respectively. Measure the buffer size value by multiplying the number of extra frames sent by the frame size for each egress port.
Notes:
The oversubscribed ports are a pair of ingress and egress ports. The oversubscribed ports in the texts describing the first are port 2 & 3, which are incorrect, should be port 1 & 2. The oversubscribed ports in the texts describing the second are port 4 & 5, which are incorrect, should be port 3 & 4.