[c-nsp] Re: Cisco 7600 vs Juniper M7i
Ian Cox
icox at cisco.com
Thu Jun 2 12:56:00 EDT 2005
At 04:54 PM 6/2/2005 +0200, Simon Leinen wrote:
>Church, Chuck writes:
> > Is this really a fair fight though? You're comparing a router
> > against a high-end layer 3 switch on just Ethernet. Everything they
> > tested was things the 7600 can do on the PFC.
>
>Note that PFC3B/PFC3B-XL can do many things (IPv4/IPv6 uni/multicast,
>MPLS, various forms of tunnel encapsulations, IPv4/IPv6 Netflow (they
>can only export IPv4 flows for now though), many kinds of QoS)...
>
> > I'd expect the Cisco to destroy the Juniper on that. Now if they'd
> > tested OC-x interfaces, that'd have been a totally different story,
> > I bet.
>
>We have a few OC-12c and OC-48c POS interfaces (OSMs) on the 7600, and
>they perform fine. They are quite expensive though, the port density
>isn't that impressive, and they cannot use the Sup720 switching fabric
>(but the 32 Gbps legacy bus supports quite a few of them). Forwarding
>is done by the PFC even for these interfaces.
The OSMs do use the Sup720 switch fabric to move packets between line
cards, running at 8Gbps. They use the bus just to pass the packet
headers to the PFCx to make the forwarding decision.
wodonga#sh mod
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 4 2-port CHOC-12/DS0
SI OSM-2CHOC12/T1-SI SAD0625024U
2 24 CEF720 24 port 1000mb
SFP WS-X6724-SFP SAL08394EXH
3 4 2-port OC-12c ATM MM+ OSM-2OC12-ATM-MM
4 0 4-subslot SPA Interface
Processor-200 7600-SIP-200 JAB080504XZ
5 2 Supervisor Engine 720
(Active) WS-SUP720-BASE SAD07170004
7 4 2-port OC-48c POS
SM OSM-2OC48/1DPT-SS SAD060202HU
8 4 1-port OC-48c POS
SM OSM-1OC48-POS-SS SAD0537012R
9 16 SFM-capable 16 port 1000mb
GBIC WS-X6516-GBIC SAD044908G9
wodonga#sh fabric status all
slot channel speed module fabric
status status
1 0 8G OK OK
2 0 20G OK OK
3 0 8G OK OK
4 0 20G OK OK
5 0 20G OK OK
7 0 8G OK OK
8 0 8G OK OK
9 0 8G OK OK
>The SPA/SIP modules that Simon mentioned should improve choice of
>ports, port density, and performance (I think these carrier cards *do*
>have fabric attachments).
The Enhanced FlexWAN, all OSMs, 7600-SIP-200, 7600-SIP-400 all have
fabric connections.
Ian
>--
>Simon.
>
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