PAgP
PAgP is Cisco’s proprietary link aggregation protocol for EtherChannel negotiation.
Updated: 2026-03-05
Definition
PAgP negotiates an EtherChannel between Cisco devices using desirable/auto modes.
Many networks prefer LACP because it is standards-based.
Key points
- Cisco proprietary
- Desirable/Auto negotiation
- Alternative: LACP
Common mistakes
- Trying to use PAgP with non-Cisco devices.
- Confusing PAgP modes with LACP modes.
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