From: muhtari.adanan@bt.com
Date: Sat Jan 10 2004 - 13:43:12 GMT-3
Yes, Scott is right. Apologies, was in a bit of a hurry then.
-----Original Message-----
From: Scott Morris [mailto:swm@emanon.com]
Sent: 09 January 2004 19:05
To: 'Hoyle, Anthony (AL)'; Adanan,M,Muhtari,XGH3 R;
cchurch@wamnetgov.com; ccielab@groupstudy.com
Subject: RE: CCIE Security Vs R&S
AF42 would be class 4 (IP Prec 4 = 100) and drop probability 2 (100) or
100100 = DSCP 36.
RFC 2597 holds these values. http://www.faqs.org/rfcs/rfc2597.html
However, he was asking about the "ip tos max-throughput". According to RFC
791, which is the older IP Precedence way of looking at things:
IP Prec Critical = 101 (5)
High througput = bit 4 (010 for the last three) so 101010 = 42 in DSCP as
noted. DSCP 42 has no setting within an assured forwarding or expedited
forwarding class (Per Hop Behavior class).
http://www.faqs.org/rfcs/rfc791.html
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIS, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: muhtari.adanan@bt.com [mailto:muhtari.adanan@bt.com]
Sent: Friday, January 09, 2004 11:26 AM
To: Hoyle, Anthony (AL); cchurch@wamnetgov.com; ccielab@groupstudy.com
Subject: RE: CCIE Security Vs R&S
Hi,
Critical = 101
MaxTput = 0100 (ignore last zero)
DSCP Equiv = 101010 = af42 (means af4 and medium drop probability 2)
Muhtari
-----Original Message-----
From: Hoyle, Anthony (AL) [mailto:ALHoyle@dow.com]
Sent: 09 January 2004 15:42
To: 'Church, Chuck'; Adanan,M,Muhtari,XGH3 R; ccielab@groupstudy.com
Subject: RE: CCIE Security Vs R&S
I have a QOS question for everyone..suppose I have the following on my
edge router right before my service provider (actual production Device):
I have a local policy that contains the following in the route-map
Set ip precedence critical
Set ip tos max-throughput
Now I know that ip precedence critical = 101 and the tos value is 110(low
delay and high throughput /w normal reliability).
Together they form DSCP value 101110 which is DSCP 46...But what is the
assured forwarding value? Is it AF53,
the only reason I guess 53 is because I know the previous value is 43. But
how do you mathematically calculate
this? The reason I ask, is we are doing using random-detect based on DSCP
values, and when I use the
Show commands for the policy map, it shows the AF values /w drop probability
etc...
Help anyone...more for clarification on converting the DSCP values to AF
values, -or is kind of follow the leader?
Anthony Hoyle
EDS
WAN Infrastructure Analyst
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Church, Chuck
Sent: Friday, January 09, 2004 8:14 AM
To: muhtari.adanan@bt.com; ccielab@groupstudy.com
Subject: RE: CCIE Security Vs R&S
Interesting question. I don't think either one is technically harder than
the other, although I think the list of equipment on the Security lab makes
it tougher to study for, as finding IDSs, VPN concentrators, and the server
software is much tougher than buying 2600s on EBay. There are also many
more R&S CCIEs in the world than Security, so possibly it may easier to find
a job with the Security. But then again, I don't see too many jobs that
specifically mention 'R&S' or 'Security'. I believe that most employers
feel that if you can pass one, the others wouldn't be too much of a stretch.
Just my .02 though.
Chuck Church
CCIE #8776, MCNE, MCSE
Wam!Net Government Services
13665 Dulles Technology Dr. Ste 250
Herndon, VA 20171
Office: 703-480-2569
Cell: 703-819-3495
cchurch@wamnetgov.com
PGP key:
http://pgp.mit.edu:11371/pks/lookup?op=index&search=cchurch%40wamnetgov.com
> -----Original Message-----
> From: muhtari.adanan@bt.com [mailto:muhtari.adanan@bt.com]
> Sent: Friday, January 09, 2004 5:12 AM
> To: ccielab@groupstudy.com
> Subject: CCIE Security Vs R&S
>
>
> Hi,
>
> Which is perceived to be more difficult to attain CCIE Security or
> R&S? And which is more financially rewarding?
>
>
> Regards
>
> --------------------------------------------------------------
> ------------------------------------------
> Muhtari Adanan,
> Design Engineer
> BTexaCT
>
> * Tel: +44 (0) 1473 606482 * E-mail:
> muhtari.adanan@bt.com
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