The 3.2Gbps per FPC cannot be directly linked to the line rate, if I
remember well, because of the cell chopping that the PIC does in order to
send packets to IP II in fixed size packet chunks.
A safe bet is line rates summing up to 2.5Gbps, which is known to be line
rate; I wouldn't bet on 3 GigE being line rate at all scenarios, but at most
usages it will be because of the smaller packets.
The non-blocking throughput of the GigE PIC seems to exceed wire rate; some
"evil" experiments with a packet generator, violating inter-frame-gap lower
limit, were handled by it with no problem.
Rubens Kuhl Jr.
-----Original Message-----
From: Gary Hauser [mailto:ghauser@juniper.net]
Sent: Friday, June 22, 2001 2:17 AM
To: 'Dmitri Kalintsev'; juniper-nsp@puck.nether.net
Subject: RE: M5 throughput question
I believe we support 600 (p)VC's per interface and 3000 total per box. The
GigE picks perform at wire speed unless you have all 4 slots full in an FPC.
The FPC is capable of 3.2 gig max no matter what the PIC configuration is.
So 3x(2xOC3)=(6x155)=930mbit + 1000mbit = 1.930Gbit. You Still have
1.270Gbit left.
E. Gary Hauser
Senior Education Services Engineer
JNCIE #12, CCIE # 4489
Juniper Networks Inc.
ghauser@juniper.net
jedi@routergod.com
-----Original Message-----
From: Dmitri Kalintsev [mailto:dek@hades.uz]
Sent: Thursday, June 21, 2001 8:24 PM
To: juniper-nsp@puck.nether.net
Subject: M5 throughput question
This one is probably for somebody from Juniper:
If I get M5 with 1xGE PIC and 3xdual OC3 PICs, would this run at wire speed?
Assume that OC3's used for "access" and GE is uplink, so all traffic is
between VCs and GigE, no or very little cross-VC traffic.
As well, I need to know hardware/software limits, if there are any:
- How many ATM VCs per OC3 on dual OC3 PIC?
- How many VCs per dual OC3 PIC?
- How many total VCs per M5 box?
- How many interfaces in total one can have?
One more question: on single port GigE PIC, how close its non-blocking
throughput to wire speed?
P.S. VC == PVC in my context. ;)
Thanks,
-- CCNP, CCDP (R&S) Dmitri E. Kalintsev CDPlayer@irc Network Architect @ connect.com.au dek @ connect.com.au phone: +61 3 9674 3913 fax: 9251 3666 http://-UNAVAIL- UIN:7150410 cell: +61 414 821 382
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