This is disappointing :( The sales hype indicated this was revolutionary. Instead it is a slight improvement over the existing switch gear with crippled MPLS and routing capability. The 4:1 over subscription at the port level even limits it for intense SAN usage.
-- LR Mack McBride Network Administrator Alpha Red, Inc. > -----Original Message----- > From: Tim Stevenson [mailto:[EMAIL PROTECTED] > Sent: Tuesday, January 29, 2008 7:12 AM > To: mack; Tom Storey; Pete Templin > Cc: cisco-nsp@puck.nether.net > Subject: RE: [c-nsp] Nexus 7000 > > At 03:04 AM 1/29/2008 -0600, mack observed: > >Ok that math doesn't make sense. > >60/48=1 1/3 not 2. > > So at small packets, this system can do 4 ports non blocking & 6704 can > do ~3. > > >Even at that 32 ports with 80gbps forwarding is still an > >oversubscription of 4:1 > > Yes, this card is 4:1 oversubscribed at the port level - ie 4 ports > share 10G b/w toward the rest of the system, you will never get more > than 10G from each 4-port group. > > > >Of course real world will probably allow forwarding of more than > >80gbps at 60mpps. > > You will not get more than 80G out of this card. > > > >The performance listed jives pretty well with the 230gbps / slot > >(figure 500 byte packets). > > The 230G is a characteristic of the intially shipping FABRIC - the > initially shipping IO modules don't leverage the full fabric b/w. > > >Meaning a 1.4:1 oversubscription on the 32 x 10GE card (assuming > >single direction traffic). > > No, you will not get a 1.4:1 ratio on this card. > > Tim > > > >-- > >LR Mack McBride > >Network Administrator > >Alpha Red, Inc. > > > > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
