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Note switch default IP (192.168.1.1) means TFTP needs no console prep

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Per the ERS 59100 Quick Install Guide, the switch defaults to 192.168.1.1/24
on VLAN 1 if DHCP fails. Method 3 now notes that on a factory/reset switch
you can TFTP without configuring anything via console first.

https://claude.ai/code/session_01JR2EMK7rwrZJowpstcaxQ6
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Claude
2026-03-24 04:17:06 +00:00
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@@ -546,17 +546,19 @@ The switch reboots after the agent upgrade.
### Method 3 — TFTP from a laptop (no dedicated server needed)
Your laptop can act as a temporary TFTP server. Plug both the console cable **and** an Ethernet cable from the laptop into the switch at the same time.
Your laptop can act as a temporary TFTP server. The switch has a default IP of **`192.168.1.1/24`** on VLAN 1 out of the box (or after a factory reset) — so on a fresh switch you can skip console IP configuration entirely. Just plug in Ethernet and go.
Plug both the console cable **and** an Ethernet cable from the laptop into the switch at the same time.
On the laptop:
```bash
sudo apt install tftpd-hpa
sudo cp ers5900diag_*.bin ers5900_*.img /srv/tftp/
sudo ip addr add 192.168.1.50/24 dev eth0
sudo ip addr add 192.168.1.50/24 dev eth0 # must be on same /24 as switch default (192.168.1.x)
sudo systemctl start tftpd-hpa
```
Then on the switch via console:
Then on the switch via console (or via SSH to `192.168.1.1` if SSH is already enabled):
```
enable
copy tftp address 192.168.1.50 filename ers5900diag_7x_x_x_x.bin
@@ -571,6 +573,8 @@ Stop the server when done:
sudo systemctl stop tftpd-hpa
```
> **No console needed on a factory switch:** The switch answers at `192.168.1.1` immediately after boot. As long as your laptop is on `192.168.1.x/24`, the TFTP transfer works without touching the console at all — useful if you only have an Ethernet cable and no console cable handy.
---
### Method 4 — XMODEM over console cable (last resort, no network required)