COLORADO SPRINGS, Colo. Juniper Networks Inc. countered Cisco Systems Inc.'s claims of higher CRS-1 shipments by unveiling details of a core router to be shown at next week's NxtComm conference.
The T1600 uses the same half-rack chassis as the earlier T640, which will eventually allow it to scale through distributed topologies using the Juniper TX Matrix software.
The chassis backplane and interface cards are the same as the T640, allowing existing T640 customers to change out line cards, each of which can offer 100-Gbit/second services. One seven-foot rack can accommodate two routers, for an aggregate throughput of 3.2 Tbits/second. Juniper is comparing its half-rack chassis with a throughput of 1.28 Tbits/second on a Cisco full-rack, seven-foot CRS-1.
In December 2004, Juniper launched a three-stage Clos switching topology to connect multiple router chassis systems. Alan Sardella, senior product marketing manager, said a similar Clos fabric will be offered in the future. Juniper hasn't provide specs about a matrix cluster for T1600, though a forwarding speed in excess of 6 billion IP packets/second is expected.
Juniper has dual 50-Gbit/second packet-processing ASICs on each line card. Interface slots were tested for 100-Gbit/second performance by generating 50-Gbit/second, 64-byte Ethernet frames through the system.
Juniper now is using a Session Resource Control management and policy-control software suite, reflecting more complex video and IP multimedia subsystem traffic in modern cores. One enhancement of Multi-Protocol Label Switching (MPLS) offered in the new routers is "Liquid Label Switched Paths," in which MPLS LSPs are dynamically configured for changing traffic types.
Sardella said the combination of the policy-engine software and the Liquid LSP allows quality-of-service adjustments optimized for real-time video.
Juniper is using tunable optics and is easing interfaces with long-haul optical transponders, all with the intention of linking directly with long-haul and ultra-long-haul optical transport systems. Junos software works with both standardized MPLS and generalized MPLS, used with an optical control plane.