Arista Portal

  • Tag : VRF

 
 

GRE tunneling over VRF won’t work

Posted on July 1, 2021 by   |   0 Views

Hi EOS EXPERTS! We are having some issues here in trying to setup a GRE tunnel using local vrf. The setup is simple, I have my PE(arista device) connected to a CE. The PE/CE interface is configured over a VRF that is only local, I have e2e connectivity. Here is my configuration: PE01#show run int tunnel 107 interface Tunnel107 description SL mtu 8000 vrf ACME ip address 172.16.0.228/31 tunnel mode gre tunnel source interface Ethernet3 tunnel destination 10.136.202.149 tunnel key 107 PE01#show ip route vrf ACME 10.136.202.149 VRF: ACME <ommited> B E 10.136.202.128/26 [200/0] via 172.16.3.2, Ethernet3 #ETH3-CONFIG PE01#show run...
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tacacs over vrf

Posted on May 26, 2021 by   |   0 Views

I am trying to configure TACACS over a vrf and for some reason no packets are being sent (all of the TACACS counters are zero).  Any ideas what might be wrong? tacacs-server timeout 2 tacacs-server host 10.136.216.38 key 7 XXXXXXXXXXXXXXXXXXXXXXXXXX tacacs-server host 10.184.103.198 key 7 XXXXXXXXXXXXXXXXXXXXXXXXXX ! aaa group server tacacs+ group1 server 10.184.103.198 vrf management ! aaa group server tacacs+ group2 server 10.136.216.38 vrf management ! aaa authentication login default group group1 group group2 local aaa authentication enable default group group1 group group2 local aaa authorization exec default group group1 group group2 local aaa accounting exec default start-stop group...
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Support for in-band traffic in a management VRF without routed SVI or physical interfaces

Posted on April 6, 2021 by   |   99 Views

Description A Management VRF instance allows network operators to separate their management traffic from the rest of the production or services traffic. Previously, if there was a requirement to access the management VRF over an in-band interface (without the provision of an out-of-band management port) then an assignment of a dedicated routed SVI or physical port to that VRF would be required. This enhancement removes the need to configure a routed in-band interface in a management VRF or when IP control packets in a non-management VRF is exchanged over routes which point to special forwarding adjacencies like nexthop-groups or tunnels...
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control-plane IPv6 access list in VRF

Posted on October 27, 2020 by   |   0 Views

I’m trying to batten down the hatches on my Arista switch but just discovered this limitation: switch02.dev(config-cp)#ipv6 access-group control-plane vrf internet in ! Control plane IPv6 access-list is not supported in a VRF In which EOS version is support for this available?

Configure VRF to isolate internal subnet

Posted on August 28, 2020 by   |   0 Views

We would like to know which scenario/architecture would be the best to isolate internal subnet’s with a firewall, we have proposed 2 options   VRF’s, in which we would put the internal subnets (interface VLAN’s) on a different VRF and we will communicate between VRF (let’s call it internal vs external) through a firewall. Dynamic routing, in which we would put the firewall between the Core Router and the MPLS/MAN/WAN routers with OSFP between them. Please take into account the following: the main objective is to inspect the North-South traffic only, and NOT inspect the East-west traffic

command “vrf definition” deprecated

Posted on June 24, 2020 by   |   0 Views

Using CloudVision to initially configure our switches, some errors showed up today for wich I didn’t find documentation and which are hard to handle. I use configlet builder scripts which automatically build initial configuration concluding vrf definition for managment purposes and I get the following errors while trying to change configuration of an EOS 4.23.0F preloaded switch: 1. > vrf definition MANAGEMENT% Unavailable command (This command is deprecated by ‘vrf instance [VRF_ID]’) at line 2. > rd 65001:480% Invalid input at line 3. > ip domain-name<domain-name>% Unavailable command (This command is deprecated by ‘dns domain’) at line 4. > vrf...
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EVPN Transit Route VRF Leaking

Posted on April 27, 2020 by   |   716 Views

Description As described in the L3 EVPN VXLAN Configuration Guide, it is common practice to use Layer 3 EVPN to provide multi-tenancy within a datacenter. This is achieved by keeping each tenant’s prefixes in separate VRFs.   In order to allow hosts from different VRFs to communicate with each other, a new mechanism lets the Spine act as a VTEP to which cross-VRF traffic will be directed for leaking.   The Spine will: Import specific learned IP or IPv6 prefixes belonging to one VRF into another Advertise these leaked routes to relevant EVPN neighbors (Leafs) with itself as next-hop. Furthermore,...
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Inter-VRF Local Connected Route Leaking

Posted on October 12, 2019 by   |   666 Views

Description This feature allows the leaking of connected routes from one VRF (the source VRF) to another VRF (the destination VRF) on the same router. Connected routes can be leaked using the following methods: BGP based leaking using the appropriate import and export route targets configured on the source and destination VRFs. VrfLeak Agent based leaking using the appropriate subscription policy in the destination VRF. Leaking connected routes differs from leaking other types of routes in that it causes additional routes to be leaked. These additional routes are: Attached routes covered by the connected route being leaked. An attached route...
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BGP VPN and Inter-VRF Local Route Leaking Support for default VRF

Posted on June 17, 2019 by   |   1714 Views

Description This feature extends the BGP Layer 3 VPN Import/Export and VRF Route Leaking functionality to “default” VRF. Currently, these functionalities are only supported for non-default VRF. Please refer to this TOI for more details on the support for non-default VRF. EOS supports the following two types of VPN configurations and this feature is applicable for both. RFC 4364 BGP/MPLS L3 VPN (TOI Link) BGP L3 EVPN (TOI Link) This feature is available when configuring BGP in the multi-agent routing protocol model. Platform Compatibility DCS-7250 DCS-7050TX/SX/QX DCS-7060X DCS-7280R DCS-7500R Configuration Configuring BGP VPN in default VRF is similar to how it is...
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iBGP over VRF – Open Message Error/bad BGP ID

Posted on April 24, 2019 by   |   0 Views

Hi all, I am trying to establish iBGP between 2 Arista devices in a VRF, and got this error: Peering failure hint: Open Message Error/bad BGP ID Do you what what does it mean? The current status is: DEFRA2-NDSW99#sh ip bgp nei vrf PSP BGP neighbor is 10.208.1.140, remote AS 65508, internal link BGP version 4, remote router ID 0.0.0.0, VRF PSP Failed connection attempts is 321 Idle-restart timer is inactive BGP state is Active Peering failure hint: Open Message Error/bad BGP ID Last sent notification:Open Message Error/bad BGP ID, Last time 00:01:48, First time 35d13h, Repeats 41026 Last rcvd...
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RIB route control: next hop resolution policy

Posted on January 22, 2019 by   |   261 Views

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   |   0 Views

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   |   0 Views

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   |   0 Views

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   |   0 Views

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   |   0 Views

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   |   0 Views

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   |   0 Views

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   |   0 Views

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

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