Re: SoC 2009 Ayame MPLS

[basteon <basteon%gmail.com@localhost>]

hello,
I'm come back.

Well, I getting dump hello's packets of cisco LDP's. Its with diff
service stuff, but like old mpls version with hello field's 0x0100,
the new specification has 0x0901 value. I've not juniper equipment. I
did test it on 3640 and 7206 in dynamips. DiffServ on netbsd and on
cisco has differently dscp values, for example...
#define DSCP_AF11       0x28
#define DSCP_AF12       0x30
#define DSCP_AF13       0x38
af11     Match packets with AF11 dscp (001010) 0xA
af12     Match packets with AF12 dscp (001100) 0xC
af13     Match packets with AF13 dscp (001110) 0xE
It's just local usage choose wait queue for either packet wich has
diffserv field "(c0) <-diff". However, cisco suppor the most dscp
modes than altq on NetBSD.

So, I would write new userland daemon wich can be support old version
like cisco(with diff field) and new with e-lsp, l-lsp via TE. E-lsp
and L-lsp are very different, first suppor just 8 class of service and
determine PHB from EXP until 8 per lsp, second most than 8 class of
service and can be support determine PHB from EXP or label and just
one per lsp. Furthermore, i'll be try to do it with support juniper
LDP's, if any body given me dump of the packet specify for same
vendor.


15:38:30.759819 IP (tos 0xc0, ttl 1, id 0, offset 0, flags [none],
proto UDP (17), length 62) 10.10.0.1.646 > ALL-ROUTERS.MCAST.NET.646:
[udp
 sum ok]
        LDP, Label-Space-ID: 14.0.0.1:0, pdu-length: 30
          Hello Message (0x0100), length: 20, Message ID: 0x00000000,
Flags: [ignore if unknown]
            Common Hello Parameters TLV (0x0400), length: 4, Flags:
[ignore and don't forward if unknown]
              Hold Time: 15s, Flags: [Link Hello]
            IPv4 Transport Address TLV (0x0401), length: 4, Flags:
[ignore and don't forward if unknown]
              IPv4 Transport Address: 14.0.0.1
          0x0000:  0000 0000 0400 0004 000f 0000 0401 0004
          0x0010:  0e00 0001
        0x0000:  0100 5e00 0002 ca00 02d7 0000 0800 45(c0) <-diff
        0x0010:  003e 0000 0000 0111 cee2 0a0a 0001 e000
        0x0020:  0002 0286 0286 002a eb33 0001 001e 0e00
        0x0030:  0001 0000 0100 0014 0000 0000 0400 0004
        0x0040:  000f 0000 0401 0004 0e00 0001
15:38:30.963783 IP (tos 0xc0, ttl 255, id 0, offset 0, flags [none],
proto UDP (17), length 62) 12.0.0.1.646 > 14.0.0.2.646: [udp sum ok]
        LDP, Label-Space-ID: 14.0.0.1:0, pdu-length: 30
          Hello Message (0x0100), length: 20, Message ID: 0x00000000,
Flags: [ignore if unknown]
            Common Hello Parameters TLV (0x0400), length: 4, Flags:
[ignore and don't forward if unknown]
              Hold Time: 90s, Flags: [Targeted Hello]
            IPv4 Transport Address TLV (0x0401), length: 4, Flags:
[ignore and don't forward if unknown]
              IPv4 Transport Address: 14.0.0.1
          0x0000:  0000 0000 0400 0004 005a 8000 0401 0004
          0x0010:  0e00 0001
        0x0000:  ca00 02e9 0000 ca00 02d7 0000 0800 45(c0) <-diff
        0x0010:  003e 0000 0000 ff11 a0ec 0c00 0001 0e00
        0x0020:  0002 0286 0286 002a 3af3 0001 001e 0e00
        0x0030:  0001 0000 0100 0014 0000 0000 0400 0004
        0x0040:  005a 8000 0401 0004 0e00 0001

On 06/03/2009, Mihai Chelaru <kefren%netbsd.org@localhost> wrote:
> On Fri, 2009-03-06 at 20:22 +1000, basteon wrote:
>> hi,
>> >the ldp at least is not fully RFC compliant
>> Why? In RFC5462 contained information about EXP field(on cisco it like
>> CoS), it's quality of service stuff switching labels via priority
>> traffic on top level like udp, tcp, http,... To implement that thing
>> on NetBSD it's quite hardwork:), I think. Because it needs use
>> pf-hooks so as to permit label in firewall and altq via queue cbq
>> frame prioriting. Or you mean something else?
>
> I was stricly speaking about RFC3036, which by the way, got obsoleted by
> RFC5036.
>
> --
> Mihai Chelaru
>
>