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April 2nd, 2025 18:15
Connect S4048T-ON to Cisco Catalyst 4948E
I want to connect the Dell switch (port 52) using a QSFP port to a 10Gb/s connection on the Cisco Catalyst 4948E.
I'm new to doing this on the Dell equipment. I've read about the 6 ports are 40Gb.
Do I need a break out cable? Or will it negotiate to 10Gb since the Cisco is that speed?
I've tried various single mode and multi mode fiber cables.
In my attempts, I have on the Cisco side, the trunk port is up and up (line protocol).
On the Dell switch, it is up but the link protocol is down.
On the Dell switch, I ran show interface ethernet 1/1/52 and several notable settings are below:
Ethernet 1/1/52 is up, line protocol is down
Pluggable media present, SFP+ type is SFP+ 10GBASE-SR-AOC-7.0M (QSA)
Liniespeed 0, Auto-Negotitiation off
Flowcontrol rx on tx off
Input and output statistics are all 0's.
Receive power reading is no power
DELL-Joey C
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April 3rd, 2025 02:41
Hi,
Yeah, the port 52 needs to be configured to have quad mode.
Below would be a example configuration:
Console(conf)#do show running-config interface fortyGigE 1/52
!
interface fortyGigE 1/52
no ip address
shutdown
Console(conf)#stack-unit 1 port 52 portmode quad
Warning: Enabling Quad mode on stack-unit 1 port 52. Please verify whether the configs related to interface Fo 1/52 are cleaned up before proceeding further.
[confirm yes/no]:y
Quad mode is enabled on stack-unit 1 port 52
Console(conf)#Apr 3 00:38:38.985 UTC %STKUNIT1-M:CP %IFMGR-5-DYNAMIC_FANOUT: Port 52 in slot 1 has been fanned-out
Console#show interfaces status
Port Description Status Speed Duplex Vlan
Te 1/52/1 Down 10000 Mbit Auto --
Te 1/52/2 Down 10000 Mbit Auto --
Te 1/52/3 Down 10000 Mbit Auto --
Te 1/52/4 Down 10000 Mbit Auto --
DELL-Rey G
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1K Posts
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April 2nd, 2025 19:36
See page 402 and then page 400 of the pdf at this link, you will need to put port 52 into fan out mode
Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4 | Dell US
Rey
#Iwork4Dell
(edited)
bweddell
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April 6th, 2025 20:06
Thanks, Joey. On the 4048T-ON I have, I managed to do that successfully!
But for anyone else seeing this post, syntax was a little different. Here's how I did it:
from conf t:
interface breakout 1/1/52 map 10g-4x