Monday, June 19, 2017

Cisco Catalyst 6500 vs. Cisco Nexus 7000: Do you really need to upgrade?

Since Cisco presented the bleeding edge Nexus 7000 line in 2008, network engineers have continually wrangled over the Nexus versus the Catalyst. The individuals who direct Catalyst 6500-powered networks are content with (and acclimated to) the generally utilized, bring down cost Catalyst switches. Nexus advocates support the fresher line's speed and virtualization abilities.



While each side has justifiable reason motivation to advocate for their favored line, the question still remains: Should you utilize the Nexus or the Catalyst?

The appropriate response is basic yet dubious: It depends. Both the Nexus and Catalyst lines give a rich arrangement of abilities, so everything boils down to choosing which interfaces and components your business requires. Cisco may endeavor to push the market toward the more costly Nexus 7000 Series, yet your choices ought to be founded on what your system needs—not what Cisco needs.

System Construction

The Nexus 7000 and Catalyst 6500, while both very solid center exchanging stages, have various contrasts in physical development.

Forwarding Architecture

The most critical is the sending design. The Catalyst 6500 can bolster both brought together sending (where the chief settles on the sending choice) or disseminated sending (where the line card settles on the sending choice). The Nexus 7000, then again, just uses appropriated sending.

Switch Fabric

The Catalyst 6500 coordinates its switch fabric onto the director itself, while the Nexus 7000 has the switch texture situated in a different piece of the skeleton, free of different cards. The impact of this is to make the Nexus 7000 administrator an immaculate control plane module (i.e., it runs the OS and deals with the framework), with no sending ability on it by any stretch of the imagination. Then again, the Catalyst 6500 chief acts from multiple points of view like a line card and in addition the manager.

Interfaces

When taking a gander at the two stages, the most striking distinction is in the accessible interfaces for the stages.

100GbE

While both the Nexus 7000 and the Catalyst 6500 have 40GbE interfaces accessible, presently just the Nexus has a 100GbE line card accessible.

10GbE

Most arrangements still concentrate on gigabit and 10GbE. Both stages have a similar gigabit capacity, with 48-port 10/100/1000 and different SFP cards accessible. However, for 10GbE, the Nexus 7000 has various high-thickness 10GbE choices accessible that the Catalyst 6500 does not, for example, 24-, 32-, and 48-port SFP+ and additionally a 48 port 10GBase-T line cards. The Catalyst 6500 just has 4-, 8-, or 16-port 10GbE line cards accessible.

Line Cards

The Nexus 7000 has a reasonable number of similarity issues with line cards contrasted with the Catalyst 6500. Since the different Nexus 7000 line card families show distinctive capabilities, more care needs to go into a Nexus 7000 framework to stay away from contrary line cards in a similar framework. Line card inconsistency can cause a diminishment of abilities or even line cards being closed around the framework.

Features

Both the Nexus 7000 and Catalyst 6500 offer a typical arrangement of top of the line L3 exchanging components, for example, full directing convention bolster, MPLS/VRF abilities, and QoS capacities. In any case, every stage has novel capacities that regularly impact which stage to utilize. Here are a few normal stage particular elements:

VSS (Virtual Switching System)

VSS mode, a Catalyst 6500 element, permits a couple of Catalyst 6500s to be consolidated into one sensible switch with a bound together control plane. This takes into consideration multi-body interface total and thusly high accessibility, without Spanning Tree concerns. Contrasted with the vPC highlight of the Nexus, the brought together control plane part of VSS mode takes into account the full framework capacities to be utilized on a multi-undercarriage EtherChannel, so L3 EtherChannels, MPLS mindfulness, full QoS abilities, and different elements are usable crosswise over both of the frameworks.

vPC (Virtual Port-Channel)

vPC is a standout amongst the most regularly utilized Nexus components, and like VSS mode, it is utilized to give multi-body interface conglomeration. In any case, vPC mode does work another way, and in that capacity, it has an alternate arrangement of employments. The key contrast is that vPC does not depend on a bound together control plane, so both switches still work autonomously. Along these lines, layer 3 (L3) multi-undercarriage EtherChannels are not upheld, and for L3 high accessibility, HSRP, or another switch repetition convention will even now should be utilized.

Service Modules

The Catalyst 6500 has the capacity to acknowledge various administration module line cards that can altogether augment the abilities of the framework. A few cases of administration modules are the ASA-SM card, which gives high throughput firewall capacities, and the NAM cards, which give an immediate perspective of activity going through the switch for detailing and investigation.

Virtual Device Contexts (VDC)

This Nexus 7000 element enables the client to parcel the switch into various free consistent changes (up to four for a SUP1-or SUP2-based framework, and up to eight for a SUP2E-based framework). The VDC highlight really actualizes a different control plane for every specific circumstance, guaranteeing that every setting is kept autonomous at a low level. This considers covering IP ranges, as well as covering VLAN ranges. Different associations utilize VDCs for gadget union while keeping up departmental partition (i.e., the capacity group just approaches the capacity VDC, the security group just approaches the DMZ VDC, et cetera). Along these lines, there is no conceivable approach to have VDCs speak with each other, beside physically associating a port in one VDC to a port in another VDC.

WAN and Services Interfaces

Using the 7600-SIP-200 or 7600-SIP-400, the Catalyst 6500 can bolster an extensive variety of WAN interfaces, from T1 to OC48, permitting significantly more noteworthy adaptability in how the switch can be utilized. For applications that request fine-grained QoS or extra Ethernet benefits, a portion of the 7600 Ethernet Services cards are likewise upheld.

Fabric Extenders

The Nexus 7000 backings the utilization of the Nexus 2200 Series texture extenders to also grow the framework and give a vast scale virtual suspension in the server farm. Up to 32 of the texture extenders can be bolstered by the Nexus, which can significantly disentangle administration of a server farm organize.

Software and Licensing

The Catalyst 6500 is an IOS-based stage, giving a similar summon set and UI as some other Catalyst arrangement switch. Since the Catalyst 6500 has been in steady utilization for over 10 years, the product for the stage is a demonstrated part of the switch. All Catalyst 6500 switches depend on Cisco's customary appropriate to-utilize authorizing strategy.

The Nexus 7000, be that as it may, runs NX-OS, a genuinely new cross breed working framework initially gotten from the MDS 9000 line of Fiber Channel/SAN switches, and in that capacity, has just been being used temporarily in an Ethernet situation and will probably be influenced by programming bugs. NX-OS licenses highlight on an individually premise, each initiated by means of a body and highlight particular permit key. This permit key model, similar to some other type of DRM, is a potential purpose of disappointment that can make the switch quit sending.

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