Arista Portal

  • Tag : VRF

 
 

RIB route control: next hop resolution policy

Posted on January 22, 2019 by

Description RIB Route Control is a collection of mechanisms for controlling how IP routing table entries get used. Next hop resolution policy adds support for preventing recursive resolution of next hops based on route map evaluation of resolving routes. Platform compatibility Next hop resolution policy is a platform independent feature. Configuration Next hop resolution policy is configured for a particular VRF with the rib ipv4|6 resolution policy command under router general. Arista(config)#router general Arista(config-router-general)#vrf default Arista(config-router-general-vrf-default)#rib ipv4 resolution policy MAP1 Dependant routes whose resolving route is permitted by the route map will be recursively resolved, and dependant routes whose resolving route is denied...
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NTP on vrf

Posted on May 22, 2018 by

I want the NTP traffic to go on a different VRF than default. There is a command ‘ntp source vrf vlan ‘ that i have set but it will not send any NTP traffic. the vrf ‘default’ is only used for an underlay VXLAN L3 network and have no internet access, so i have a vrf ‘MGT’ that has the management IP, SNMP and such. but i’m at loss of what to do with NTP.. running 4.20.5F on 7150, 7280 and 7010 switches (same on all)

Bash ifconfig not showing intefaces assigned to VRFs

Posted on October 26, 2017 by

Hello All! I am attempting to perform a tcpdump on an SVI assigned to a non-default VRF.  When I drop to the Arista Bash CLI and run the ‘ifconfig’ command, I do not see the SVI listed.  I do not see any interface or SVI assigned to a non-default VRF in the list. Does anyone know how I would view ifconfig details on interfaces assigned to VRFs? My gear is:Arista DCS-7050SX-128-FSoftware image version: 4.17.1F

NAT for an IP shared over BGP inside a VRF

Posted on May 10, 2017 by

Hi, I am having a bit of an issue in getting this to work and if anyone could help it would be greatly appreciated. I am trying to do a 1:1 Source and Destination NAT for a route advertised over BGP. The SNAT rule is working but the DNAT is not. Traffic hits the external interface but never exits the internal interface.   Thanks for taking a look!   Here is the relevant sanitized config: ! device: SSP2 (DCS-7150S-52-CL, EOS-4.17.0F) ! ! boot system flash:/EOS-4.17.0F.swi ! vlan 105 name Peer ! vlan 505 name Peer_TR ! vrf definition Peer_vrf rd...
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DIg and Curl on a multi VRF Switfh from bash

Posted on March 17, 2017 by

I was trying to do a Curl or Dig command con bash trying to access a ip address on a different VRF that the default but I can´t get a response, if a ping is tried the response is the same, i can´t reach to the ip address. When the ping is maded from the CLI using: ping vrf <nane> ip-address, the ping reach the address without any problem. How I can do to reach the VRF from the bash? or if you know how to do a dig or curl from CLI this can work do.

VRF & SNMP

Posted on January 27, 2017 by

Is it possible to obtain each VRF routing table via SNMP on Arista?  mplsL3VpnVrfRteInetCidrDest does not exist(?). thank you

Number of VRFs supported per platform?

Posted on January 15, 2017 by

Does anyone have an updated count of VRFs supported per-platform? Also, is the vrf limit a hard number, or is a higher count allowed with potential performance degradation? The materials at the link below seem to be out of date, and I haven’t been able to find any public release notes showing the counts have changed. Virtual Routing and Forwarding (VRF) Fundamentals   I’m specifically looking for VRF limits on the following devices: DCS-7280SR-48C6-F DCS-7060-CX-32S   For background: I’m trying to use overlay VRFs to enforce traffic separation for multiple tenants, while allowing for full speed inter-rack communication in a...
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as masquerading – need to ibgp peer in a vrf using different as number than main vrf

Posted on January 11, 2017 by

I know with arista all VRF’s have to have the same AS number. lets say I use as 65000 to ebgp peer with someone. If I set up aanother VRF and want to ibgp peer with someone using as 65005, with the “local as” function where you impersonate an AS number, if I use local-as 65005 and peer with another router using 65005 will it behave as iBGP? Because I have an arista router using 65000 for eBGP with a partner and I need to also iBGP with someone using 65005 in a second VRF. Will this local-as approach work?...
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Inter-VRF Routing on Arista 7050SX-64s

Posted on June 16, 2016 by

Hi, I’m looking at implementing a seperate VRF for some sensative traffic within our environment. I was wondering – is there a way to route traffic between VRFs running on the same device without going through seperate hardware like a firewall? Many thanks, Tom

VRF import export

Posted on April 28, 2016 by

Is there a way to perform a VRF import and export target? Similar to: ip vrf wanconnection:1 rd 65000:1 route-target export 65000:2 route-target import 65000:99 ip vrf wanconnection:2 rd 65000:2 route-target export 65000:1 route-target import 65000:99 ip vrf shared:1 rd 65000:99 route-target export 65000:99 route-target import 65000:1 route-target import 65000:2

Test TCP connectivity from respective VRF

Posted on November 13, 2015 by

I have multiple VRFs defined on my Arista switch and it is participating in routing. How can I test TCP connectivity from Arista switch to a server in specific vrf ? Take for an example, i have 3 VRFs: TRUST, UNTRUST and DMZ. In TRUST vrf, i have VLAN106. On VLAN106, i would like to connect to a web server from my Arista switch but i could not see any option for vrf with the telnet command. I tried this but I got this error: Arista01(s1)#telnet 10.1.1.80 80 /source-interface Vlan106 Trying 10.1.1.80… 10.1.1.2: Cannot assign requested address No connection. Escape...
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vrf configuration in vEOS instances

Posted on September 8, 2015 by

Hi All, I have a vEOS instance as well as a Arista hardware box. I was trying to configure vrf in both. In hardware box it was easy to configure and was able to ping my gateway using ping vrf <newvrf> <IP> command. The same configuration i tried in vEOS but it is not pinging. Is there any special config to enable vrf in vEOS? Both are in same LAN and has common gateway. The gateway is lying in a Cisco device which is out of my access. From vEOS i can do self ping, but none other IPs in...
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VARP not working on a VRF VLAN interface

Posted on December 30, 2014 by

I am running vEOS (4.14.5F) in a Lab environment and have set up a simple config of two switches connected via a single virtual hypervisor interface as an MLAG peer link. Each switch has 3 VLAN interfaces and I have configured VARP on them which works fine (show ip virtual-router displays all VARP links). When I place the VLAN interfaces into a VRF and add the ip address and ip virtual-router address back to the interface, VARP no longer works (show ip virtual-router displays an empty list). Below is a copy of the simple config for each switch I am...
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Introduction to Managing EOS Devices – Setting up Management

Posted on October 21, 2014 by

Note: This article is part of the Introduction to Managing EOS Devices series: https://eos.arista.com/introduction-to-managing-eos-devices/      1) Setting Up Management The following management tools are available on Arista EOS for all platforms: VRF-aware management Telnet and SSH Syslog and Console Logging SNMP Versions 1 and 3 NTP DNS Local and remote user control (AAA) TACACS+, RADIUS sFlow XMPP eAPI   Note: in the following configuration examples, the commands in square brackets are optional: [optional]   1.1) VRF Aware Management As of release 4.10.1, EOS supports the ability to constrain management functions to a VRF. This enables the user to separate management based functions...
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VRF-lite support in the 7500e coming?

Posted on January 29, 2014 by

As per the question, is this on the road map? Interested in hearing how Arista propose to deal with security boundaries in a multi-tennant DC environment using a VXLAN leaf-spine topology. Right now I am thinking I will need to break out the VXLANs into VLANs at the spine VTEP and send them to a L3 gateway where they can be put into the appropriate VRFs. It would be great if this bottleneck and .1q limitation could be avoided and directly switched on the 7500 spine by way of VXLAN to VRF mapping.

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