Tag :: EOS 4.21.0F

The feature allows to create a custom (i.e. named) TC, DP to DSCP mapping profile that can be applied on an interface.

EVPN route advertisements carry RD and RT. RD (Route Distinguisher) : prepend to the tenant’s IP Prefix or MAC address to make it globally unique. RT (Route Target) : a BGP extended community used to tag the EVPN route.  The EVPN import policy is chosen to select what is the target tenant VRF is imported from the global EVPN table.

L2 protocol frames - LLDP, LACP and STP are trapped to the CPU by default. This feature allows for disabling the per protocol trap on a given set of interfaces. Starting from 4.32.1F, forwarding of MACsec EAPoL frames is also supported on a per interface basis on certain platforms. Starting from 4.35.0F, specific platforms support forwarding LLDP VXLAN encapsulated frames while continuing to trap regular/local LLDP frames to the CPU per interface.

LANZ Mirroring feature allows users to automatically mirror traffic queued as a result of congestion to either CPU or a different interface.

This document describes the latest status of LANZ on DCS 7500R, DCS 7280R and DCS 7020R, for both polling and notifying

IP traceroute and path MTU (PMTU) discovery both require that routers send ICMP reply messages to the host that invokes each network function. When the route to the destination host traverses an MPLS label-switched path (LSP), the label switching routers (LSRs) will also need to send ICMP reply messages to the originating host.

Priority Flow Control is a link-layer flow control mechanism which may be used by an overwhelmed network node to ask its transmitters to stop transmission for a specified period of time. It does so by using special frames known as PFC frames, thus, relieving congestion at the receiver node. With respect to this behavior, PFC is very similar to Link Layer Flow Control ( LLFC ), however, unlike LLFC, PFC allows the overwhelmed node to specify which 802.1Q Class of Service ( CoS ) it wants to stop receiving traffic for. Thus, allowing differentiated treatment of traffic based on CoS.

This feature is available in the VLAN configuration mode. When a switch receives a packet with unknown destination MAC address on a VLAN, L2 miss happens. The current behavior for L2 miss packets is to flood the packet on all ports of the VLAN. In certain cases, there may be a preference to drop or log L2 miss packets instead of flooding them across the VLAN.