Ahost is a generic Fedora based Linux OS primarily for the purposes of hosting cEOS. It has a 64 bit kernel (EosKernel)

CEOS 4.21.0F

ASU allows a user to upgrade the switch to a newer software release with minimal downtime (no traffic loss). In some

4.21.0F ASU

Prior to this release, BGP in “ribd” mode (when routing protocols are configured in


DCS 7280SRM 40CX2 (see picture below), is a 1RU fixed system, which has two CFP2 ports (41 and 42), capable of hosting


The show interfaces capabilities default command provides static interface capability information.  This


Coherent signaling technology is used for data transmission over long distances. These transmitted signals are


Note:. EOS 4.21.0F and subsequent releases may require manual updates to frequency or channel and grid spacing in

Coherent 4.21.0F

Headroom buffers are used to store packets when ingress admission control checks fail to store them in both the


DHCP relay agent uses one of the addresses configured on the interface as the source IP when relaying messages to the

DHCP 4.21.0F

This feature allows Dhcpv6 relay agent to add Client link layer address option (specified in RFC 6939) to solicit and

4.21.0F DHCPv6

DHCPv6 relay supports Remote ID option (37) insertion in relay messages providing the Layer 3 interface name on which

4.21.0F DHCPv6

Network operators have to monitor all kinds of information on the health of their networking equipment like


IPv6 multicast routing protocols are used to distribute IPv6 datagrams to one or more recipients. IPv6 PIM builds and

Multicast Ipv6 4.21.0F

The 'clear isis neighbor' command can be used to delete and possibly re establish IS IS adjacencies on a box. Issuing


This feature allows user to configure adjacency SID of global scope for IS IS adjacencies. It is an extension to IS IS

Isis 4.21.0F

Lanz Mirroring feature allows users to automatically mirror traffic queued as a result of congestion to either CPU or

LANZ 4.21.0F 4.22.1F

A MACsec port with this feature enabled transmits LLDP frames without MACSec encryption and receives LLDP frames

MacSec 4.21.0F

IP traceroute and path MTU (PMTU) discovery both require that routers send ICMP reply messages to the host that

MTU MPLS 4.21.0F

The MLD protocol is the IPv6 equivalent of IGMP for IPv4. Multicast routers use MLD to find out about multicast


This feature provides per multicast route ingress packet and byte counters for multicast routed packets.


This article describes the configuration to match on Ipv4 packets based on packet length in Access control


DCS 7160. Host table partitioning provides the ability to change the allocation of MAC and host route tables on a


Priority Flow Control is a link layer flow control mechanism which may be used by an overwhelmed network node to ask its

4.21.0F PFC

This feature allows users to view most recent history of offset from master, mean path delay and skew values via CLI

Ptp 4.21.0F 1588v2

QinQ L3 subinterfaces divide a single ethernet or port channel interface into multiple logical L3 interfaces based

QinQ 4.21.0F

This feature is an extension of Qos Policy. It allows the user to configure Qos Policy Map counters. If a class map is

Starting in the EOS 4.21.0F release, reload console logs are available to help in debugging of unexpected reloads.


RIB Route Control is a collection of mechanisms for controlling how IP routing table entries get used.  FIB Policy

4.21.0F RIB

Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend

The Segment security feature provides the convenience of applying policies on segments rather than interfaces or


The feature allows modification of the egress TTL of packets routed via PBR. It allows to modify the TTL of naked


These are the release notes and configuration guide for the OpenConfig feature in the 4.21.0F release.

OpenConfig 4.21.0F

This article describes how QoS attributes are handled on tap ports as of EOS 4.20.5F. Prior to EOS 4.20.5F, QoS

Tapagg 4.21.0F

As of EOS 4.21.0F, CLI commands can specify different TCAM profiles for different linecards in Tap Aggregation mixed

Tapagg 4.21.0F

While in Tap Aggregation mode, we support traffic only in one direction through either Tap ports receiving packets

Tapagg 4.21.0F

This feature enables user to configure the list of bytes from the packet which can be used for Lag/Ecmp hashing in the


Unicast Reverse Path Forwarding (uRPF) can help limit malicious traffic on a network. uRPF works by enabling the


This feature is available in the VLAN configuration mode. When a switch receives a packet with unknown