From: Tarun Pahuja (pahujat@gmail.com)
Date: Thu Jun 21 2007 - 05:19:53 ART
Eric,
On all Point-to-Point Protocol (PPP) and Multilink PPP (MLP) links,
TX-ring
buffer size is automatically configured, and you cannot change these default
buffer values.On Frame Relay links, the TX-ring is for the main interface,
which all
subinterfaces also use. The default TX-ring buffer size is 64 packets(Per
Main T1 interface). You mightneed to change this setting when the
subinterface is very small or there are many
subinterfaces.
http://www.ssuet.edu.pk/~amkhan/cisco/Cisco_IP_Telephony_QoS_Design_Guide.pdf
HTH,
Tarun Pahuja
CCIE#7707(R&S,Security,Voice,SP,Storage),CCSI
On 6/21/07, Eric Poulin <epoulins@yahoo.com> wrote:
>
> Hi GS,
>
> I have a frame-relay link with two point-to-point subinterfaces, s0/0.501
> and s0/0.502,
> and I need to reduce serialization delay for any packets to 10ms on
> s0/0.501. I know I
> can accomplish this by using FRTS and making sure the interval is 10ms and
> also enabling
> fragmentation to whatever byte size is 10ms, but should I enable it on
> both
> subinterfaces?
>
> From what I understand, there's a single Tx Ring per interface,
> considering this, if
> s0/0.502's interval is left to default (125ms) and is transmitting a 1500
> byte packet,
> s0/0.501 would have to wait for that packet to exit the Tx Ring before
> being able to
> transmit anything? In this case, s0/0.501 would not meet the requirements
> of 10ms delay?
> Is my theory right?
>
> Your feedback is greatly appreciated,
>
> Thanks,
> Eric
>
>
>
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