Cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin -

This image was released in the . As of today, it is End-of-Software Maintenance (EoSW) — no new security patches are being released for this exact version unless you have a service contract for extended support.

The primary technical documentation (or "paper") for this specific software version is the

: This represents the classic Cisco IOS version mapping. In this case, IOS XE 3.11.5E maps directly to the underlying Cisco IOS Release 15.2(7)E5 codebase. cat4500es8-universalk9.spa.03.11.05.e.152-7.e5.bin

This image is for the older Catalyst 4500 non-E series or the Supervisor 6/7 engines.

Later 15.2(7)E releases include early VXLAN bridging and routing support — useful for modern data center leaf-spine designs. This image was released in the

This structural shift guarantees high availability on Catalyst switches:

: The standard binary executable file extension for Cisco systems. Target Hardware: Supervisor Engine 8-E In this case, IOS XE 3

That filename looks like a specific for a Catalyst 4500E series switch.

| | Features Supported | | ---------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | Layer 3 Switching & Routing | Full IPv4/IPv6 unicast routing, OSPF, EIGRP, BGP, IS-IS, Policy-Based Routing (PBR), GLBP, HSRP, VRRP. | | Security | IEEE 802.1X (multi‑domain, guest VLAN, RADIUS, MAB), Port Security, ACLs, FIPS 140‑2/3 certification, Control Plane Policing (CoPP). | | Multicast | PIM‑SM/SSM/DM, IGMPv1/v2/v3 (snooping & host stack), MSDP, BIER. | | High Availability | VSS (Virtual Switching System) redundancy, ISSU (In‑Service Software Upgrade). | | Management & Programmability | NETCONF, RESTCONF, Embedded Event Manager (EEM), Python scripting, Smart Call Home, SNMP (v1/v2c/v3), NetFlow/Flexible NetFlow, IPFIX, sFlow. | | QoS & Traffic Management | MQC, NBAR, LLQ, WRED, class‑based shaping/policing, Auto‑QoS. | | Data Center Bridging | Priority Flow Control (PFC), DCBX, FCoE. | | Network Services | NAT, DHCP Server/Relay, DHCP Snooping, PPPoE, L2TPv3. | | Converged Access | Integrated wireless LAN controller (for Sup8‑E), Cisco TrustSec (MACsec), PoE/PoE+ management. |

⚠️ Do NOT attempt to load this on older Sup6 or Sup7 cards. It will not boot and could corrupt the bootflash.

Use a secure protocol such as SCP or SFTP to move the image onto the supervisor's local file system ( bootflash: ). Avoid legacy TFTP for files of this size due to timeout risks.