I'd also be inclined toward quirky 9k internals. I believe a colleague of
mine troubleshot an issue with latency/slowness through some Nexus switches
(I can't recall if they were 9ks). After engaging TAC, they noticed that
"no ip redirects" was applied to the VLAN 1 SVI but none of the other SVIs.
Running into some weird issues with a Cisco Nexus9k.
We have a Cisco 3750X pair stacked, port channel (2x 1G) to a two different
blades on a Nexus9k. Isolating the links of the port channel , on one link
we can consistently get 800mbps (using iperf), or the other link we
consistently get ~34mbps.
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