EIGRP is a proprietary distance vector routing protocol developed by Cisco that uses DUAL algorithm. It provides fast convergence using neighbor adjacencies, variable length subnet masking, and supports authentication using MD5. The metric formula uses bandwidth, delay, reliability, load, and MTU to calculate the best path and can be customized using K values. EIGRP configuration involves enabling it on interfaces, redistributing routes, tuning timers, and troubleshooting with show commands.
In this deck from the 2019 OpenFabrics Workshop in Austin, Ariel Almog from Mellanox presents: To HDR and Beyond.
"Recently, deployment of 50 Gbps per lane (HDR) speed started and 100 Gbps per lane (EDR) which is a future technology is around the corner. These technologies exposing various new physical interfaces for copper and optical interfaces and type of transceiver like SFP-DD. Supporting these speeds also toughen the task to get low BER (Bit Error Rate) through FEC (Forward Error Correction) algorithm. The high bandwidth might cause the NIC PCIe interface to become a bottle neck as PCIe gen3 can handle up to single 100 Gbps interface over 16 lanes and PCIe gen4 can handle up to single 200 Gbps interface over 16 lanes. In addition, since the host might have dual CPU sockets, Socket direct technology, provides direct PCIe access to dual CPU sockets, eliminates the need for network traffic to go over the inter-process bus and allows better utilization of PCIe, thus optimizing overall system performance."
Watch the video: https://wp.me/p3RLHQ-k0B
Learn more: http://mellanox.com
and
https://www.openfabrics.org/2019-workshop-agenda-and-abstracts/
Sign up for our insideHPC Newsletter: http://insidehpc.com/newsletter
Introduction to Network Performance Measurement with Cisco IOS IP Service Lev...Cisco Canada
IP SLA is a Cisco IOS feature available today to actively and proactively measure and report many network metrics. It is easy to use, and is supported by many existing network management applications.
In this deck from the 2019 OpenFabrics Workshop in Austin, Ariel Almog from Mellanox presents: To HDR and Beyond.
"Recently, deployment of 50 Gbps per lane (HDR) speed started and 100 Gbps per lane (EDR) which is a future technology is around the corner. These technologies exposing various new physical interfaces for copper and optical interfaces and type of transceiver like SFP-DD. Supporting these speeds also toughen the task to get low BER (Bit Error Rate) through FEC (Forward Error Correction) algorithm. The high bandwidth might cause the NIC PCIe interface to become a bottle neck as PCIe gen3 can handle up to single 100 Gbps interface over 16 lanes and PCIe gen4 can handle up to single 200 Gbps interface over 16 lanes. In addition, since the host might have dual CPU sockets, Socket direct technology, provides direct PCIe access to dual CPU sockets, eliminates the need for network traffic to go over the inter-process bus and allows better utilization of PCIe, thus optimizing overall system performance."
Watch the video: https://wp.me/p3RLHQ-k0B
Learn more: http://mellanox.com
and
https://www.openfabrics.org/2019-workshop-agenda-and-abstracts/
Sign up for our insideHPC Newsletter: http://insidehpc.com/newsletter
Introduction to Network Performance Measurement with Cisco IOS IP Service Lev...Cisco Canada
IP SLA is a Cisco IOS feature available today to actively and proactively measure and report many network metrics. It is easy to use, and is supported by many existing network management applications.
VRRP (Virtual Router Redundancy Protocol) is a computer networking protocol that provides for
automatic assignment of available Internet Protocol (IP) routers to participating hosts. This increases the
availability and reliability of routing paths via automatic default gateway selections on an IP subnetwork.
The Virtual Router Redundancy Protocol (VRRP) eliminates the single point of failure inherent in the
static default routed environment. VRRP specifies an election protocol that dynamically assigns
responsibility for a virtual router (a VPN 3000 Series Concentrator cluster) to one of the VPN
Concentrators on a LAN. The VRRP VPN Concentrator that controls the IP address(es) associated with a
virtual router is called the Master, and forwards packets sent to those IP addresses.
Cisco CCNA/CCNP Training/Exam Tips that are helpful for your Certification Exam!
To be Cisco Certified please Check out:
http://asmed.com/information-technology-it/
VRRP (Virtual Router Redundancy Protocol) is a computer networking protocol that provides for
automatic assignment of available Internet Protocol (IP) routers to participating hosts. This increases the
availability and reliability of routing paths via automatic default gateway selections on an IP subnetwork.
The Virtual Router Redundancy Protocol (VRRP) eliminates the single point of failure inherent in the
static default routed environment. VRRP specifies an election protocol that dynamically assigns
responsibility for a virtual router (a VPN 3000 Series Concentrator cluster) to one of the VPN
Concentrators on a LAN. The VRRP VPN Concentrator that controls the IP address(es) associated with a
virtual router is called the Master, and forwards packets sent to those IP addresses.
Cisco CCNA/CCNP Training/Exam Tips that are helpful for your Certification Exam!
To be Cisco Certified please Check out:
http://asmed.com/information-technology-it/
EIGRP is a cisco proprietary, Advance distance vector, classless Interior gateway routing protocol.
Released in-1994.
It works on Network Layer of OSI Model.
It use the IP protocol no 88. (It doesn’t use TCP or UDP)
EIGRP AD – 90
Eigrp External routes AD – 170
EIGRP has a maximum hop-count of 224, though the default maximum hop-count is set to 100
1. EIGRP packetlife.net
Protocol Header Attributes
8 16 24 32 Type Distance Vector
Version Opcode Checksum
Algorithm DUAL
Flags
Internal AD 90
Sequence Number
External AD 170
Acknowledgment Number
Summary AD 5
Autonomous System Number
Standard Cisco proprietary
Type Length
Protocols IP, IPX, Appletalk
Value
Transport IP/88
Metric Formula Authentication MD5
K2 * bw K5 Multicast IP 224.0.0.10
256 * (K1 * bw + + K3 * delay) *
256 - load rel + K4 Hello Timers 5/60
· bw = 107 / minimum path bandwidth in kbps Hold Timers 15/180
· delay = interface delay in µsecs / 10
K Defaults Packet Types
EIGRP Configuration
K1 1 1 Update
Protocol Configuration
K2 0 3 Query
! Enable EIGRP
router eigrp <ASN> K3 1 4 Reply
! Add networks to advertise K4 0 5 Hello
network <IP address> <wildcard mask>
K5 0 8 Acknowledge
! Configure K values to manipulate metric formula
metric weights 0 <k1> <k2> <k3> <k4> <k5>
Terminology
Reported Distance
! Disable automatic route summarization The metric for a route advertised by a neighbor
no auto-summary
Feasible Distance
! Designate passive interfaces The distance advertised by a neighbor plus the cost
passive-interface (<interface> | default) to get to that neighbor
Stuck In Active (SIA)
! Enable stub routing
The condition when a route becomes unreachable
eigrp stub [receive-only | connected | static | summary]
and not all queries for it are answered; adjacencies
! Statically identify neighoring routers with unresponsive neighbors are reset
neighbor <IP address> <interface> Passive Interface
An interface which does not participate in EIGRP but
Interface Configuration whose network is advertised
! Set maximum bandwidth EIGRP can consume
ip bandwidth-percent eigrp <AS> <percentage>
Stub Router
A router which advertises only a subset of routes,
! Configure manual summarization of outbound routes and is omitted from the route query process
ip summary-address eigrp <AS> <IP address> <mask> [<AD>]
Troubleshooting
! Enable MD5 authentication show ip eigrp interfaces
ip authentication mode eigrp <AS> md5
ip authentication key-chain eigrp <AS> <key-chain> show ip eigrp neighbors
! Configure hello and hold timers show ip eigrp topology
ip hello-interval eigrp <AS> <seconds> show ip eigrp traffic
ip hold-time eigrp <AS> <seconds>
clear ip eigrp neighbors
! Disable split horizon for EIGRP
no ip split-horizon eigrp <AS> debug ip eigrp [packet | neighbors]
by Jeremy Stretch v2.1