[j-nsp] MX ping - ToS overrided

[david.roy at orange.com]

Not the case with 12.3R4 for me :

ping 8.8.8.8 tos 96 

15:37:03.950763 Out IP (tos 0x60, ttl  64, id 64980, offset 0, flags [none], proto: ICMP (1), length: 84) X.X.X.X > 8.8.8.8: ICMP echo request, id 34658, seq 3, length 64

Do you have host-inbound-traffic knob or Output FWF on lo0 that rewrites control plane ? 


 
David Roy 
IP/MPLS NOC engineer - Orange France
Ph. : +33 2 99 87 64 72
Mob. : +33 6 85 52 22 13
SkypeID : davidroy.35
david.roy at orange.com
 
JNCIE x3 (SP #703 ; ENT #305 ; SEC #143)



-----Message d'origine-----
De : juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net] De la part de Arash Alizadeh
Envoyé : mercredi 22 janvier 2014 15:22
À : juniper-nsp at puck.nether.net
Objet : [j-nsp] MX ping - ToS overrided

Hi,
 
I'm experiencing issues when initating ToS ping from MX devices. The specified ToS argument just seems to be overrided to dec 192 when leaving the interface.
 
I verified this with the traffic monitor on the egress interface:
 
user at node> ping 8.8.8.8 tos 96
64 bytes from 8.8.8.8: icmp_seq=0 ttl=246 time=15.675 ms
64 bytes from 8.8.8.8: icmp_seq=1 ttl=246 time=15.385 ms
 
user at node> monitor traffic interface xe-0/0/0.0 extensive matching icmp PFE proto 2 (ipv4): (tos 0xc0, ttl 255, id 16332, offset 0, flags [none], proto: ICMP (1), length: 84) x.x.x.x > 8.8.8.8: ICMP echo reply, id 47826, seq 0, length 64
14:06:58.721197 Out 
 
I've tried this on 11.4R6.6 and 12.3R4-S2 (ppc and 64-bit) boxes with the same result.
 
Did anyone else ran into this issue? 
Any input is appriciated. 
 
Regards,
Arash
 		 	   		  
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