Skip to main content
Share Your Experience: Take the 2024 Developer Survey
6 votes
Accepted

Why doesn't Ethernet protocol support switch fabric topology?

"Switched fabric" (SW) is mainly used for Fibre Channel networks as its contrasts the other FC topologies point-to-point (P2P) and arbitrated loop (AL). The point in SW being that there are multiple, ...
Zac67's user avatar
  • 84.8k
4 votes
Accepted

SFP modules and LC-to-LC patch panels?

OM4 is good for 400 m with 10GBASE-SR or for 550 m with 1000BASE-SX, according to the IEEE standards. (These can often be "extended" but there's no guarantee.) The link power budget isn't usually a ...
Zac67's user avatar
  • 84.8k
3 votes

Connect two Ethernet network devices with fibre cable

Yes, you can do this with equal-speed fiber transceivers which support the same transmission type. For example, if each PC has a 1000baseLX SFP, you can simply connect a single-mode patch cord ...
Jeff Wheeler's user avatar
  • 5,468
3 votes
Accepted

SFP compatibility on QLogic FC HBA and Cisco FC SFPs

If it accepts the HP branded ones, it will likely accept the Cisco tagged one as well. If the HP one is multi-rate (and almost always are), it should work at whatever speed both sides can support. (i....
Ricky's user avatar
  • 32.2k
2 votes
Accepted

iSCSI silent data corruption

TCP checksums are only detecting errors - there's no correction, just retransmission. iSCSI is a protocol without a defined physical interface - so asking for its expected (undetected) error rate is ...
Zac67's user avatar
  • 84.8k
2 votes
Accepted

Connect two Ethernet network devices with fibre cable

Having an ethernet crossover cable it is possible to make a lan, connecting both devices directly with no need of a router or switch. For twisted-pair Ethernet, most devices support Auto MDI-X today, ...
Zac67's user avatar
  • 84.8k
2 votes

FibreChannel topology

N-port is a node port, actually it's HBA on a server or a port on a storage array. It is used to connect a node to a Fibre Channel switch. On Brocade switch you would usually have F-port, which is "...
Mikhail Zakharov's user avatar
2 votes

Data and Payload fields in Fibre Channel frame header

The short answer is that the Data Field (2112 bytes) overlays the combination of the Optional Header (64 bytes) and Payload (2048 bytes). They are not separate fields. The use of the Optional Header ...
MikeLRoy's user avatar
2 votes

AOC cables for Brocade Fiberchannel

You will need to check your switch's manual or compatibility list. Not all switches (and firmware versions) are compatible with AOC cables. Additionally, 10 Gb cables are not guaranteed to work with ...
Zac67's user avatar
  • 84.8k
2 votes

SFP modules and LC-to-LC patch panels?

This will depend on the quality of your fiber, patch panels, patch cords, and specific SFP optics. Several examples from my collection of aging ethernet capable FC optics (1/2/4G): Ethernet1/15 ...
Ricky's user avatar
  • 32.2k
2 votes

Which addresses are used in fcp header?

Source/Destination addresses here are 24 bit FC Port addresses which consist of 3 bytes: Domain ID, Area ID and Node ID. Details you can find, for example, here: https://www.storagefreak.net/2014/10/...
Mikhail Zakharov's user avatar
1 vote
Accepted

AOC cables for Brocade Fiberchannel

After talking with my Brocade vendor, "there are no such thing as 16 GB FC AOC cable". Is have been a misunderstanding between Brocade FiberChannel and Brocade ethernet I mean, the communication in ...
KorXo's user avatar
  • 1,152
1 vote

FibreChannel topology

Point-2-point mode is the opposite of arbitrated-loop mode (AL). You usually do not want AL if there's a switch. Set all ports to P2P at all times unless you really do need AL mode (when you chain ...
Zac67's user avatar
  • 84.8k
1 vote
Accepted

Data and Payload fields in Fibre Channel frame header

Notice that the Payload is part of the Data Field. The only difference is that you can have an optional header, otherwise the Data Field and Payload are the same field, with the same length.
Ron Maupin's user avatar
  • 99.8k

Only top scored, non community-wiki answers of a minimum length are eligible