Per-peer queuing provides isolation between peers by allocating hardware queues on a per-peer basis for the following TCP-based protocols: BGP, T-LDP, LDP, MSDP, Telnet, and SSH.
This mechanism guarantees fair and non-blocking access to shared CPU resources across all peers. For example, this ensures that an LDP-based DoS attack from a specific peer is mitigated and compartmentalized and not all CPU resources are dedicated to the overwhelming control traffic sent by that specific peer.
The per-peer-queuing command ensures that service levels would not be (or only partially be) impacted in case of an attack toward BGP, T-LDP, LDP, MSDP, Telnet, or SSH. SSH and Telnet supports per-peer queuing when the login-control ttl-security command is enabled.