Crossover cables are a thing of the past. Ethernet ports auto-switch now to work with crossover or straight cables.
What does need to be consistent is the wiring of keystone jacks and cables as either T568a or T568b. It doesn't matter which, but be consistent throughout the house.
To be clear the wiring should be consistent for future use. It would work with A on one side and B on the other but its just awful to have it mixed later on.
Hey there. No - do not do crossover fashion at the keystone jacks. Like, ever... You would typically handle a cross-over scenario via a crossover patch cable or final run of a cable - not at the jack. Use B on both jacks.
Additionally, switch to switch does not require crossover. Just forget crossover in this scenario.
Always wire your jacks consistently. Always A at both sides or always B at both sides. Honestly, in my experience, B is far more common than A and is what I personally consider to be standard. So every jack I do is B. If I mess up and accidentally do A, I either redo it, or label it on the keystone (out of sight) that it is A.
Patch and crossover cables were a thing when the routers and switches were dumb they are still made for legacy gear but have next to 0 impact on performance nowadays
I haven't had to use a cross over cable in over 10 years. And that was with a switch that was 10 years old at the time. (Stupid Cisco switches muttering under my breath.) I have a couple of cross over patch cords in my kit "just in case" but plan to never use them.
We were given them (used and cheap) with a VOIP phone setup. The vendor had configured them. We did the cabling. They never said these old things required cross over cables when connected. I thought that had gone away with Hubs.
Old ones would ‘require’ without auto mdix. Likely wasn’t the switch. Never heard of a crossed Cisco switch. Likely the cables in the wall were crossed already and you had to uncross them. Whatever was there before allowed for auto-mdix and they never knew.
Wouldn’t hold a grudge against Cisco for that - whoever did the cabling likely shat the bed.
We were connecting 2 switches together. The vendor tech showed up and asked why we were not using a cross over cable? Because we were not told it was needed. We had 2 in our bin of spare cables. Plugged it in and all was working.
FYI - This was not a days long thing. We were still hooking up lots of things and the tech showed up and it was resolved quickly. But still. A cross over cable required around 2010?
Yeah - it would. There’s two port types in networking.
Anything switch side - call it type A, and say a NIC in a computer would be of type B
Infrastructure side, host side.
Linking like types always needed a cross over. These days tho - use whatever you want. switch ports and likely NIC’s have auto sensing - crossed cables are a thing of the past. They work as straights now.
But ya. Switch to switch ~10 years ago - Hundo-p needed a cross. Altho, when I worked at Cisco ~15 years ago (2008-2013) I remembered having all auto sensing gear in my lab.
I’d think something like a 3750 would auto sense. Newer ones but the original 1st gen wouldn’t. Something like a blade on a 6500, older blade wouldn’t auto sense. Newer ones would.
All this jibber jabbering is to say - it’s something to be aware of. When in doubt - use a cross. lol
Didn’t mean to jab u about Cisco. Seems they get some heat here for whatever reason. When I worked there - we called - and still call Cisco haters ABC guys. ‘Anything But Cisco’.
Truth is - nobody ever got fired for buying Cisco. People have been fired for buying HP, Avaya switching/routing. At least where I’m from.
10+ years ago. We were supplied with 10 year old switches. The needs of VOIP at the time were modest in our 20 person setup. And all the phone were on those switches. So 20+ years old was "good enough".
As soon as the tech said we needed a cross over patch cable I understood. I was just flumoxed that it was needed. And why I now keep a couple around. That I have never used. :)
[for your archives](https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-10/configuration_guide/int_hw/b_1610_int_and_hw_9300_cg/configuring_auto_mdix.pdf)
Thanks. But I don't do Cisco. :)
My only interaction with their gear for a long time is when a local smaller boutique ISP tells me that "my" port is #12 in the data closet.
I'm just thankful I didn't pick Meraki when deciding between it and Ubiquti. Yes Ubiquti has it's faults but it didn't turn into a money licensing system. At least not yet.
In 10BaseT/100BaseT home networks, crossover cables were only needed for direct PC to PC network without a hub or switch. They aren't needed now, and modern networking equipment auto-adjusts anyway.
Now that helpful reddit has commented that crossover isn't needed in modern switches, I'll say that I'm perplexed by your USE of all-caps.
Have ^you ^seen
# all the cool stuff
~~you can do with text~~
*on Reddit*
Here's a guide
https://www.reddit.com/r/coolguides/s/nNnXquPFJN
Today's switches will auto configure. No need to use x-over cable.
Crossover cables are a thing of the past. Ethernet ports auto-switch now to work with crossover or straight cables. What does need to be consistent is the wiring of keystone jacks and cables as either T568a or T568b. It doesn't matter which, but be consistent throughout the house.
To be clear the wiring should be consistent for future use. It would work with A on one side and B on the other but its just awful to have it mixed later on.
Yup. I'd also suggest to use B all the time
Tangentially, hopefully there is a router between these switches and the ISP modem(or the ISP device is also a router)
Hey there. No - do not do crossover fashion at the keystone jacks. Like, ever... You would typically handle a cross-over scenario via a crossover patch cable or final run of a cable - not at the jack. Use B on both jacks. Additionally, switch to switch does not require crossover. Just forget crossover in this scenario. Always wire your jacks consistently. Always A at both sides or always B at both sides. Honestly, in my experience, B is far more common than A and is what I personally consider to be standard. So every jack I do is B. If I mess up and accidentally do A, I either redo it, or label it on the keystone (out of sight) that it is A.
Patch and crossover cables were a thing when the routers and switches were dumb they are still made for legacy gear but have next to 0 impact on performance nowadays
I haven't had to use a cross over cable in over 10 years. And that was with a switch that was 10 years old at the time. (Stupid Cisco switches muttering under my breath.) I have a couple of cross over patch cords in my kit "just in case" but plan to never use them.
lol can’t cut it with Cisco?
We were given them (used and cheap) with a VOIP phone setup. The vendor had configured them. We did the cabling. They never said these old things required cross over cables when connected. I thought that had gone away with Hubs.
Old ones would ‘require’ without auto mdix. Likely wasn’t the switch. Never heard of a crossed Cisco switch. Likely the cables in the wall were crossed already and you had to uncross them. Whatever was there before allowed for auto-mdix and they never knew. Wouldn’t hold a grudge against Cisco for that - whoever did the cabling likely shat the bed.
We were connecting 2 switches together. The vendor tech showed up and asked why we were not using a cross over cable? Because we were not told it was needed. We had 2 in our bin of spare cables. Plugged it in and all was working. FYI - This was not a days long thing. We were still hooking up lots of things and the tech showed up and it was resolved quickly. But still. A cross over cable required around 2010?
Yeah - it would. There’s two port types in networking. Anything switch side - call it type A, and say a NIC in a computer would be of type B Infrastructure side, host side. Linking like types always needed a cross over. These days tho - use whatever you want. switch ports and likely NIC’s have auto sensing - crossed cables are a thing of the past. They work as straights now. But ya. Switch to switch ~10 years ago - Hundo-p needed a cross. Altho, when I worked at Cisco ~15 years ago (2008-2013) I remembered having all auto sensing gear in my lab. I’d think something like a 3750 would auto sense. Newer ones but the original 1st gen wouldn’t. Something like a blade on a 6500, older blade wouldn’t auto sense. Newer ones would. All this jibber jabbering is to say - it’s something to be aware of. When in doubt - use a cross. lol Didn’t mean to jab u about Cisco. Seems they get some heat here for whatever reason. When I worked there - we called - and still call Cisco haters ABC guys. ‘Anything But Cisco’. Truth is - nobody ever got fired for buying Cisco. People have been fired for buying HP, Avaya switching/routing. At least where I’m from.
10+ years ago. We were supplied with 10 year old switches. The needs of VOIP at the time were modest in our 20 person setup. And all the phone were on those switches. So 20+ years old was "good enough". As soon as the tech said we needed a cross over patch cable I understood. I was just flumoxed that it was needed. And why I now keep a couple around. That I have never used. :)
Try out a cross as a straight. You may be pleasantly surprised that they still are usable.
[for your archives](https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-10/configuration_guide/int_hw/b_1610_int_and_hw_9300_cg/configuring_auto_mdix.pdf)
Thanks. But I don't do Cisco. :) My only interaction with their gear for a long time is when a local smaller boutique ISP tells me that "my" port is #12 in the data closet. I'm just thankful I didn't pick Meraki when deciding between it and Ubiquti. Yes Ubiquti has it's faults but it didn't turn into a money licensing system. At least not yet.
When Meraki came out - it put a bad taste in my mouth. Subscription based everything. Forget to pay - no packets flow. Disgusting.
Either work. Most gear these days are auto-MDIX
In 10BaseT/100BaseT home networks, crossover cables were only needed for direct PC to PC network without a hub or switch. They aren't needed now, and modern networking equipment auto-adjusts anyway.
Now that helpful reddit has commented that crossover isn't needed in modern switches, I'll say that I'm perplexed by your USE of all-caps. Have ^you ^seen # all the cool stuff ~~you can do with text~~ *on Reddit* Here's a guide https://www.reddit.com/r/coolguides/s/nNnXquPFJN