TE packet bandwidth

[italobusi]

TE packet bandwidth augmentations in ietf-te-mpls-topology can be moved to te-topology-packet since they are not specific for MPLS but also applicable to other packet technologies (e.g., ETH).

[italobusi]

2020-12-18 TEAS Call

Discussion about how to represent TE packet bandwidth (in Mbps, Gbps)

Option 1:

cir
  bandwidth uint64
  unit      enum

Option 2:

cir string (with a pattern)

Option 3:

(unit)
  (kbps)
    cir-kbps
  (mbps)
    cir-mbps
  (gbps)
    cir-gbps

Agreement for Option 2

@tsaad-dev : propose the pattern
@xufengliu : check if XPath allows comparison in case the string is using scientific notation

A pattern using scientific notation seems preferable to enable comparisons, as per https://tools.ietf.org/html/rfc7950#section-6.4:

• 10k -> 10e3
• 10m -> 10e6
• 1100 -> 1.1e3

[italobusi]

A pattern using scientific notation seems preferable to enable comparisons, as per https://tools.ietf.org/html/rfc7950#section-6.4:

https://tools.ietf.org/html/rfc7950#section-6.4 references IEEE 754 which is "IEEE Standard for Binary Floating-Point Arithmetic".

I am not sure this definition actually supports scientific notation.

[tsaad-dev]

Sample type:
typedef bw-string {
pattern "[0-9].[e-E][0-9]."
}

Sample leaf:
leaf bw {
type bw-string;
}

[italobusi]

Fixed in https://datatracker.ietf.org/doc/html/draft-busizheng-teas-yang-te-mpls-topology-01