RE: TOS reserved bits 6/7 and routing protocols

From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Wed Aug 02 2006 - 12:14:15 ART


Hi Bob,

AFAIK Routing Protocols uses IPP = 6 to send traffic

You can test this, by establishing a BGP Session between 2 routers and
applying this access-list to the input interface, where the BGP Packet came
from

Extended IP access list tos
    10 permit ip any any precedence routine
    20 permit ip any any precedence priority
    30 permit ip any any precedence immediate
    40 permit ip any any precedence flash
    50 permit ip any any precedence flash-override
    60 permit ip any any precedence critical
    70 permit ip any any precedence internet (12 matches)
    80 permit ip any any precedence network

HTH
Victor.

-----Mensaje original-----
De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de
CCIEBOB
Enviado el: Miircoles, 02 de Agosto de 2006 10:59 a.m.
Para: ccielab@groupstudy.com
Asunto: TOS reserved bits 6/7 and routing protocols

Hello all. I was recently told that some routing protocols (BGP) uses the
reserved TOS bit for routing protocol establishment and updates. I could
not find any documentation to support this. Does any one know if this
statement is correct, and if so where can I find documentation on it? TIA.
Bob



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