Questions tagged [arista]

Use this tag for Arista Specific questions.

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Arp Table Shows Remote Ethernet MAC but Ping Fails [closed]

arp -an table shows the correct IP and MAC addresses ? (10.0.100.130) at 5e:e1:87:a2:ee:f8 [ether] on xapi0 but pinging that IP address fails. LAN only, no router. Ethernet frames get really close. ...
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-1 votes
2 answers
36 views

Unable to configure BGP on Arista DCS-7048T-A

I am, admittedly, rather lacking in networking knowledge. However, I managed to learn quite a lot of server and development skills through trial & error and by asking various people/forums. I hope ...
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0 votes
1 answer
40 views

Inconsistent behavior of link aggregation

I'm testing bandwidth between two switches and I noticed link aggregation behaves inconsistently between test runs. I'm testing with a single instance of iperf with 2 streams. Sometimes the load is ...
  • 101
0 votes
1 answer
421 views

Arista vEOS and EVE-NG setup

I have EVE-NG up and running and Have successfully imported an Arista EOS image. Connected a couple of VPCS to it. But I can't seem to get them to ping each other. I did assign IPs to the VPCS for ...
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1 vote
1 answer
48 views

What is the appropriate VLAN configuration for this?

We have a group of clients connects to a Arista switch with DHCP enabled. And we want to setup an additional private VLAN so that those clients can communicate to each other through pre-defined static ...
2 votes
1 answer
258 views

Arista 7050 Ipv6 problem

I have 2x Arista 7050S in MLAG configuration and I configured IPv6 on them, IPv6 unicast routing is enabled, and I assigned 2aXX:XX:1::100/120 to interface vlan 80 and here is the interface vlan ...
0 votes
1 answer
937 views

How can I obtain SNMP OID from Arista in right way?

What is right way for obtain Oid from Arista? I need obtain temperature from the switch. From this I find out that CPU sensor OID is .1.3.6.1.2.1.1.1.100006001: switch#show snmp mib walk .1 | grep &...
1 vote
1 answer
523 views

Problems when configuring VLAN on Arista vEOS Router

I'm setting up a network on GNS3 with the end goal of configuring VxLAN. I routed 3 Arista vEOS router together and each of them has a host attached. With basic L3 routing, everything works. I need ...
1 vote
0 answers
476 views

arista pbr - set ip default nexthop

i have arista 7050s-52 and here is my config : policy-map type pbr pbr-tun 10 class pbr-tun-acl set nexthop 172.x.x.x class-map type pbr match-any pbr-tun-acl 10 match ip access-group ...
3 votes
1 answer
638 views

How to use the first four Ethernet ports on Arista 7050QX-32S?

I'm trying to configure an Arista 7050QX-32S switch and basically the first 4 ports are missing on the switch. This model is a full 40GbE switch and there's four 10GbE interfaces for convenience ...
1 vote
1 answer
311 views

System default switchport shutdown on Arista EOS

Is there any equivalent to: system default switchport shutdown As available on Cisco's NX-OS to Arista EOS running with at least version 4.25.1F?
0 votes
1 answer
111 views

What prevents a device from receiving its own multicast stream, and can it be turned off?

I know that it is normally not possible for a device to receive its own multicast stream on the same network interface where it transmitted said stream. I also understand why this is sensible, and ...
3 votes
1 answer
269 views

Arista adding multiple route-map match interfaces?

on Cisco, I could do the following, route-map abc permit 10 match interface Vlan1 Vlan2 Vlan3 set metric-type type-1 But seems on Arista EOS I could only add one match interface, how could I add ...
3 votes
4 answers
751 views

Arista MLAG: should I have a separate L3 interface for keepalive like in Cisco's NX-OS?

In Cisco's NX-OS when forming the MLAG equivalent pair (vPC) there are some best practices to follow, for example, a separate bonded L3 interface just for the keepalive packets using separate ports ...
0 votes
1 answer
53 views

Arista Automation Script 7050S

I have a arista 7050S as a backup for a n3k-c3064pq-10gx i want to have an script in arista to ping the n3k-c3064 mgmt IP and if it has 4 or 5 timedout then no shut interface vlan 100-150 , can any ...
0 votes
1 answer
66 views

Arista 7050S BGP Over Management Port not working

i have an Arista 7050s with eos 4.18.1.1F and i have bgp over my management port with my management router (its a VPN router that out staff connect to this router and use our internal router) here is ...
0 votes
1 answer
346 views

Arista 7050S Management port problem

i have a arista 7050s and i have connect management port to a cisco 3750 and i see the port is up in 3750 but its down in arista ! here is the output from arista: Management1 is down, line protocol is ...
0 votes
0 answers
44 views

Arista 7050S can handle 600x SVI?

i have read Arista 7050S datasheet and everything is fit on my project, but i could not find anywhere that if 7050S can handle 500x SVI ? can any one guide me? thank you.
0 votes
0 answers
37 views

Arista 7050S-52

I have a Arista 7050S-52 and i have read its datasheet but i could not find much information, i have around 600 interface vlan, 3k ipv4 routes, 6x bgp neighbor with no full table, some simple access ...
0 votes
0 answers
156 views

Arista and "Unparalleled Performance with Dynamic Deep Buffers and VOQ for Lossless forwarding"

Arista advertises "Unparalleled Performance with Dynamic Deep Buffers and VOQ for Lossless forwarding". My employer is trialing a switch which advertises gigabytes of port buffers. How are these ...
0 votes
1 answer
129 views

BGP local-as command clarification

On my network infrastructure, an Arista switch is the core switch and a pfsense server the gateway. BGP is used to advertise routes for all the internal networks. On Arista switch, I see the BGP ...
2 votes
2 answers
1k views

Arista VXLan with QinQ

I've got a weird situation. Three doctors offices are merging in two cities and we are planning on merging them into one building in each city. Due to politics and crappy software each office will ...
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0 votes
1 answer
79 views

vpc/mlag block half of uplink?

We want to configure 2 Arista switches by mlag and connect 1 port channeled switch to both of arista's. so in this case, if one of our arista fail the other one will respond. now my question here is ...
0 votes
2 answers
522 views

Two switches, one uplink - best way to link them?

Overview I have two Arista 7050SX switches. They don't support stacking. But I essentially will be using them as a stacked pair none the less (just means managing two individual switches). They're ...
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0 votes
1 answer
305 views

Arista switch - getting chassis ID of currently logged in switch

I can not find how can i check local switch Chassis ID. here i found that command: show lldp local-info management 1 should show me what i want but there is no "local-info" option. Is there any ...
0 votes
1 answer
1k views

Difference between port-channel lacp fallback individual VS. static?

What is the exact difference between: port-channel lacp fallback individual port-channel lacp fallback static
1 vote
1 answer
710 views

Confused about switch configuration with 2 VLANs, and next hop route?

I have an Arista switch I'm trying to setup for learning. The router is a Netgate SG-3100 running pfSense 2.4.5. I have two VLANs setup: VLAN 22 - for normal browsing. Using the 10.0.22.0/24 subnet ...
1 vote
1 answer
56 views

Arista eos eAPI for full config

Anyone worked on full configuration of arista switches using the eAPI? I am going through the ansible eos_ modules and see that there are few missing configs. Do we have to use eos_config module for ...
2 votes
2 answers
404 views

Finding the available capacity on switch interface in bytes or bits

Below is the output from my "show interface " command PE1.18:01:44#sh interfaces Ethernet 3 Ethernet3 is up, line protocol is up (connected) Hardware is Ethernet, address is 001c.7374.3d95 ...
1 vote
2 answers
757 views

25G SFP28 NIC and 25G SFP Adapter

My company recently purchased some Dell R740's with 2 Dual Port 25G SFP28 NIC's (Broadcom 57414) and wants to hook them up to an Arista 25G switch. We have two types of SFP adapters from Arista: SFP-...
1 vote
1 answer
589 views

Arista 7050s Loopback Q-in-Q

Debugging an issue where I'm trying to get q-in-q working on an Arista 7050S with a loopback. I’ve got packets egressing the switch double tagged but in ingress, I can see them on the STAG’s SVI. I’...
1 vote
0 answers
119 views

Unexpected behavior when changing switch from unmanaged to managed mode [closed]

I'm currently puzzled by why a switch works only when in unmanaged mode. If I enable Management mode, using default configuration, things break down. Here's the current situation: ...
5 votes
2 answers
8k views

How to encapsulate all VLAN traffic inside VXLAN

As I understand VXLAN, it looks like it should be able to encapsulate and properly route VLAN-tagged traffic. However, in investigating how to actually configure VXLAN on network devices, it looks ...
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2 votes
3 answers
619 views

Arista switches- Email alert if interface status changes

I'm looking to be notified of interface state changes on my Arista switches without my manual polling of the logs. For example, tailing var/log/messages, I might see something like: un 29 19:10:48 ...
3 votes
1 answer
926 views

Arista: Unexpected results when pinging MLAG SVI

My understanding of Arista's implementation of MC-LAG is relatively weak, so its likely I've misunderstood a deliberate limitation of how the mlag works. Taking a basic example, Where, switch1: ...
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2 votes
1 answer
2k views

Arista: Configuration diffs and archiving

Looking through the documentation for Arista EOS - the configuration replace command was only introduced in 4.14, leaving <4.14 without any form of replacing configurations (versus simply merging). ...
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3 votes
2 answers
74 views

Arista 40G switch capeablities

I have an FPGA that outputs packets to a fixed IP and MAC address. That then feeds into a 40G Arista switch. The Unicast UDP packets correctly route to the destination IP and MAC. We now have ...
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2 votes
1 answer
619 views

Inter-PVLAN communication on Arista 7050S

We have an Arista 7050S configured with a few PVLANs. All hosts on these PVLAN share the same /24 network (major flaw?). They can communicate between themselves within each PVLAN and with the gateway (...
2 votes
1 answer
336 views

Allow outgoing connections

I have an Arista switch (EOS) and I'm having trouble allowing outgoing connection from the switch to the outside. Using tcpdump I can see that no packets are being allowed. This has an impact on DNS ...
8 votes
4 answers
4k views

Arista MLAG ISSU upgrade - primary/secondary switch?

When upgrading Arista switches which are part of an MLAG cluster, is it necessary to start with the secondary switch? In "Arista Warrior", from Gary A. Donahue, he specifies on page 123 to start by ...
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