• Tag : VRF

 
 

Configure VRF to isolate internal subnet

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

EVPN route type 5 imported

Hi, We are configuring L3 VPN service using EVPN route type 5. I can see the route in the bgp table of the VRF but in the route table, the destination of the learned prefix is null0. Can someone explain why and how to fix it? I am running vEOS 4.24.0F in our lab. Here is the output of the bgp table in the VRF: AT1-R1#show ip bgp 10.37.4.0/23 vrf CORE BGP routing table information for VRF CORE Router identifier 10.32.25.2, local AS number 65032 BGP routing table entry for 10.37.4.0/23 Paths: 1 available 65037 65370 2.2.2.3 from 1.1.1.103 (2.2.2.3),...
Continue reading →

EVPN route type 5 imported

Hi, We are configuring L3 VPN service using EVPN route type 5. I can see the route in the bgp table of the VRF but in the route table, the destination of the learned prefix is null0. Can someone explain why and how to fix it? I am running vEOS 4.24.0F in our lab. Here is the output of the bgp table in the VRF: AT1-R1#show ip bgp 10.37.4.0/23 vrf CORE BGP routing table information for VRF CORE Router identifier 10.32.25.2, local AS number 65032 BGP routing table entry for 10.37.4.0/23 Paths: 1 available 65037 65370 2.2.2.3 from 1.1.1.103 (2.2.2.3),...
Continue reading →

command “vrf definition” deprecated

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...
Continue reading →

EVPN Transit Route VRF Leaking

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,...
Continue reading →

Inter-VRF Local Connected Route Leaking

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...
Continue reading →

BGP VPN and Inter-VRF Local Route Leaking Support for default VRF

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...
Continue reading →

Nexthop resolution ribs vrf-unicast-rib

Description The regular MplsVpn functionality works as follows : For the VPN routes received from a neighbor, if and only if the nexthop of the VPN routes is resolvable via an MPLS tunnel in the default VRF, the route is imported (based on route-targets) and installed in the target VRF (import-vrf). This feature removes the above restriction and enables VPN routes to be imported and installed in a target VRF (import-vrf) if the nexthop of the VPN routes is resolvable in the imported VRF itself. With this feature no attempt is made  to resolve the VPN routes over an MPLS...
Continue reading →

iBGP over VRF – Open Message Error/bad BGP ID

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...
Continue reading →

RIB route control: next hop resolution policy

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...
Continue reading →

NTP on vrf

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

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

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...
Continue reading →

DIg and Curl on a multi VRF Switfh from bash

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

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?

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...
Continue reading →

as masquerading – need to ibgp peer in a vrf using different as number than main vrf

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?...
Continue reading →

Inter-VRF Routing on Arista 7050SX-64s

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

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

Follow

Get every new post on this blog delivered to your Inbox.

Join other followers: