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carl_townshend
Frequent Contributor

Switching and routing software vs hardware

Hi guys

with all the latest 9k switches and isr4k routers etc.

what things these days are done in hardware and what are done in software?

do routers still do qos in software or is it hardware these days ?

cheers

1 ACCEPTED SOLUTION

Accepted Solutions
Joseph W. Doherty
Hall of Fame Expert

Both switches and routers do "things" in both software and hardware.  Generally, switches do "more" in hardware (but often with "less" function).  Data plane functions are more likely to be done in hardware while control plane functions are more likely done in software.  (Reasons for the data plane and control plane "split", control plane function often more complex but "less" volume.)

Anyway, what's done in hardware or software depends on the specific switch and/or router.  Later model Cisco routers continue to provide more functions (including possibly QoS functions) with dedicated hardware support.

View solution in original post

1 REPLY 1
Joseph W. Doherty
Hall of Fame Expert

Both switches and routers do "things" in both software and hardware.  Generally, switches do "more" in hardware (but often with "less" function).  Data plane functions are more likely to be done in hardware while control plane functions are more likely done in software.  (Reasons for the data plane and control plane "split", control plane function often more complex but "less" volume.)

Anyway, what's done in hardware or software depends on the specific switch and/or router.  Later model Cisco routers continue to provide more functions (including possibly QoS functions) with dedicated hardware support.

View solution in original post