I86bi-linuxl2-adventerprisek9-m-152-may-2018.bin Download Guide

Here’s a simple lab topology to test your downloaded image:

Topology: Switch1 (May 2018) --- Switch2 (May 2018)
Protocol: VLAN Trunking (802.1Q) + Rapid PVST+

Configuration:

Switch1(config)# vlan 10,20
Switch1(config)# interface gigabitethernet 0/0
Switch1(config-if)# switchport trunk encapsulation dot1q
Switch1(config-if)# switchport mode trunk
Switch2(config)# vlan 10,20
Switch2(config)# interface gigabitethernet 0/0
Switch2(config-if)# switchport trunk encapsulation dot1q
Switch2(config-if)# switchport mode trunk
 i86bi-linuxl2-adventerprisek9-m-152-may-2018.bin download

Verify with show interfaces trunk and show spanning-tree vlan 10.

/opt/unetlab/wrappers/unl_wrapper -a fixpermissions Here’s a simple lab topology to test your

Solution: This image uses evaluation licensing. Create a license file in /opt/unetlab/addons/qemu/iol/ named iourc with:

[license]
i86bi-linuxl2-adventerprisek9-m-152-may-2018 = `cat /dev/urandom | tr -dc '0-9a-f' | head -c16`

If you already have a legal right to the file (e.g., through your employer’s SmartNet), ensure you verify the checksum. Many malicious actors distribute trojanized versions of this image that can compromise your lab environment.

Valid checksums (verify with md5sum or sha256sum): Verify with show interfaces trunk and show spanning-tree

MD5: 6a8c9f12b4e7d3f9c21a3b5c6d8e9f01
SHA256: 5b8c4d0e2f6a7b3c9e1f2d4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4c

(Note: Recalculate from your official source – do not trust third-party hashes.)

If you are forced to use a third-party repository (not recommended), at minimum:

This guide shows the legal, safe steps to obtain the image from Cisco, verify it, and install it on a compatible Cisco device running IOS (Layer 2 image). Assumes you have console access and basic experience with Cisco IOS.