#AFF A20 & A30 - How to identify which ports share the same ASIC on the IO modules ?

1 messages · Page 1 of 1 (latest)

violet acorn
#

How to identify which ports share the same ASIC on the IO modules ?

junior bane
#

You're talking about the 4x port 25GbE ConnectX-7 card right? (X60132A)

Afaik each port is capable of the the full 25Gb bandwidth, it's not being shared across ports.

burnt thunder
#

short answer: it really doesn't matter

long answer: the ASIC is shared between pairs of neighboring ports (if there are two ASICs on the card), or all four ports (if there's only one ASIC on the card). In the case of the ConnectX-7, there's only a single ASIC that drives all 4 ports

thorn onyx
#

Agree with @burnt thunder here. Generally I will still use a/d for one set of connections and c/b for the other. Goes for same on any 4 port card (sas/fc/ethernet)

violet acorn
#

Hi All, the IO module is X60132A-C

#

Where can we check if any particular card has single ASIC or multiple ?

burnt thunder
#

as I said, the ConnectX-7 has only a single ASIC. Why do you need that information though? It does not matter for the network connections neither from a performance point of view as OG1 stated, nor from a redundancy point of view

violet acorn
#

Does ASIC failure (if multiple) not matter while selecting ports for serving data ?

burnt thunder
#

no. LIFs can transparently migrate to ports on other nodes in the cluster

burnt thunder
#

also, the idea that only one ASIC fails on a card and you can continue using the other ASICs port is pretty far-fetched. It's not impossible, of course, but far more likely is that either a cable or SFP fails (single port), or the whole card fails (usually also resulting in a panic of the affected node). We have over 2000 active systems in the field and in 10+ years, I am not aware of a single ASIC on a PCI card failing where the card kept working with the other ASIC

thorn onyx
#

Still nice to design with that failure mode in mind. In this case, two cards are needed

burnt thunder
#

true, and you get resiliency against the whole card failing as a bonus. At a price though (no idea how much the ConnectX-7 cards cost but I guess they're not cheap...)

violet acorn
#

Thank you all for your insight, unfortunately, we only have one card, so I guess i will combine e0a with e0c

thorn onyx
burnt thunder
#

true... and I just noticed that the list price of these cards is not that extrem, around $5k for one (yes, nobody pays list prices, but for comparison, a single 64g 4-port fcp target adapter, the X60141A, with four 64g SFPs, is listed at $33k)

thorn onyx
#

And that cost is mostly for the sfps! Look at the card with the 32g sfps. I’m sure it’s a lot less

#

I think there’s even a model with zero sfps

burnt thunder
#

yeah, the cost of 64g SFPs is crazy

thorn onyx
#

High end
X50141a -> 64g with 32g sfps
X50142a -> 64g with 64g sfps
Low end
X60140a -> 64g with 32g sfps
X60141a -> 64g with 64g sfps
X60143a -> 64g with no sfp

burnt thunder
#

The X50141 is actually a different vendor (Emulex), and also 64g. I think you mean the X50140 and X50142 which are both QLogic just one with 32G and oine with 64G (the X50140 is not in 9.16 only in 9.17.1 so far)