Archive function Cisco 6500

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Little trick to automate save and export configs of your cores: time-period is how often the script, in minutes, is execute.write-mem command calls the archive script every time you save configs on the router. .glitchlist crew

OSPF – bandwidth reference

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in OSPF bandwidth reference variable is used to calculate the cost of a link. The default is 100Mbps so the cost calculation in 1998 was good (RFC2328) but in today’s times we have a jumbo link that transport our packets like 10Gbps, 40Gbps, 100Gbps. If we do nothing, a 1Gbps link and a 10Gbps link will be considered with the …

Arista mac-address blacklist

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In a Spine/leaf topology, if you have configured a L2Evpn over Bgp/Evpn/Vxlan it is possible that a mac address will be blacklisted if it will move too often between 2 leaf. In this case you can verify by typing the follow command on switch console if one on more mac-address are blacklisted it is possible to clear and troubleshoot the …

Vxlan routing on Arista DCS-7050tx

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A vxlan routing isn’t available in default configuration on Arista DCS-7050TX, the switch born with vxlan bridging For activate a feature is needed to dedicate a physical interface to vxlan routing and you can follow those simple steps : Choose the physical interface and configure it as follow : now you have to configure a virtual interface : well done, …

Rate Limit on Arista switch

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If you need to limit egress/ingress trafic on Arista switch read this First create a policy-map : It is important to select class-default for applying the policy to all traffic, if you need a certains queue you can do it Second apply the policy to an interface Verify : That’s all

Blackholing a Customer Edge

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Protecting the internal network or a public network segments is the Network Engineer mission’s. Usually, we have firewalls for the perimetral security, but how do we do if we want to protect public transit IP? Some public IP addresses configured on Customer Edge Routers, provide only the traffic routing from the client side to the ISP so there is no …

Ethernet Bonding with LINUX

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Want to test your WAN interface up to 2Gbps? No problem, Linux solve the problem for you . Get an additional USB-to-RJ-45 Kit to add a second Giga interface to your laptop. The USB port must be 3.0. Pre-Checks:be sure your kernel is ready and install basic tools: Setup the Bond: mode balance-alb is switch configuration less that’s mean that …