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These are routing and communication protocols developed and maintained by Cisco Systems. Standardized protocols that are deployed in Cisco products are not listed here now. Some standard protocols may be listed here because the page shows that they were developed based on a Cisco proprietary protocol that does not have its own page.
Cisco IPS Manager Express (for multiple IPS devices) Cisco Identity Services Engine (ISE) Panoptica; PostOffice protocol (not to be confused with POP3, SMTP, or other mail delivery protocols). It is a Cisco proprietary protocol that runs over UDP on port 45000. [23] It provides a communications vehicle between the sensors and the Director platform.
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks on the whole local area network. [1] To do this, VTP carries VLAN information to all the switches in a VTP domain. VTP advertisements can be sent over 802.1Q, and ISL trunks.
Cisco Inter-Switch Link (ISL) is a Cisco proprietary link layer protocol that maintains VLAN information in Ethernet frames as traffic flows between switches and routers, or switches and switches. [1] ISL is Cisco's VLAN encapsulation protocol and is supported only on some Cisco equipment over the Fast and Gigabit Ethernet links.
Label Distribution Protocol; LANtastic; LEDBAT; Lightweight protocol; Link Layer Topology Discovery; Link-Local Multicast Name Resolution; Link-ZA; List of network protocol stacks; List of P2P protocols; List of products that support SMB; Live distributed object; Local Area Transport; Local Peer Discovery; LocalTalk; LocalTalk-to-Ethernet ...
UDLD is a Cisco-proprietary protocol but HP, Extreme Networks, and AVAYA all have a similar feature calling it by a different name. HP calls theirs Device Link Detection Protocol (DLDP). Extreme Networks call it Extreme Link Status Monitoring (ELSM) and AVAYA calls theirs, Link-state Tracking.
Cisco Express Forwarding (CEF) is an advanced layer 3 switching technology used mainly in large core networks or the Internet to enhance the overall network performance. . Although CEF is a Cisco proprietary protocol other vendors of multi-layer switches or high-capacity routers offer a similar functionality where layer-3 switching or routing is done in hardware (in an ASIC) instead of by ...
PAgP is proprietary to Cisco Systems. A similar protocol known as Link Aggregation Control Protocol (LACP) — released by the IEEE — is an industry standard and is not tied to a specific vendor. PAgP messages are always sent to the well-known Cisco multicast address 01-00-0C-CC-CC-CC with protocol type code 0x0104.