Questions tagged [juniper-junos]

A tag for questions involving Juniper Networks Operating System (Junos) software.

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19
votes
4answers
40k views

Can I see the pending (commit at) changes on a JunOS box?

If an engineer configures some changes in a JunOS box and then set them to go live later, that effectively locks the config database with a configure exclusive. How can I see the changes that he or ...
16
votes
2answers
25k views

Adding a simple VLAN on a Juniper MX

after years away from JunOS, working with Foundry (now Brocade) routers, I find myself with a new Juniper MX10. All I want to do is create a simple VLAN such that two ports share one routing ...
13
votes
1answer
6k views

JunOS: Password recovery has failed

I am trying to recover a root password on an MX80 but I'm receiving some errors and have no idea what they mean (it's not live so suggestive "disruptive" steps is acceptable); The steps I have taken ...
13
votes
2answers
2k views

VPLS Multihoming on Junos - FEC confusion‏

I'm going over the VPLS multihoming options on Juniper's web site. I'm not concerned with LAG and MC-LAG for the moment. As far as I'm aware: FEC128 is when you are using manual discovery of ...
11
votes
2answers
14k views

why we can't create multiple loopback interfaces in Junos?

comparing to Cisco IOS , we can create any number of loopbacks on router , but on Junos you can create only one loopback interface (even logical units from same loopback) in the routing instance , ...
10
votes
3answers
12k views

JunOS: Can I have a live console log?

On a Cisco IOS device the command logging buffered 51200 notifications logs most information to the routers memory (obviously you can change that to informational or debugging as required). When ...
10
votes
3answers
3k views

SRX DHCP client compatibility with HP Procurve DHCP Relay

I am trying to bootstrap the config on some Juniper SRX100s and am having some DHCP issues. Specifically, I am connecting the 0/0 port (fe-0/0/0 in the software) to my existing network, where DHCP ...
10
votes
1answer
377 views

Juniper, vlan-centric vs interface-centric. Which has prevalence?

I am new to Juniper and has a basic doubt about assigning an interface to a VLAN. I have read that JunOS admits both approaches. My question is, what method prevalence when you use both of them? I ...
9
votes
1answer
29k views

What's the difference between TPID of 0x88a8 or 0x8100

I was reading over some JNCIS-SP documentation on provider bridging and it had this to say regarding the TPID field for QinQ: IEEE 802.1ad has reserved a TPID of 0x88a8 for the S-TAG however the ...
9
votes
1answer
1k views

Blocking IPv6 RA advertisements on Juniper EX series switch

How do I go about blocking IPv6 RA advertisements on access ports on a Juniper EX series switch? I know that Cisco offers ra-guard as an option much like bpdu-guard on spanning tree, I am just not ...
8
votes
2answers
3k views

JunOS FreeBSD version?

http://juniper.cluepon.net/index.php/JunOS JUNOS prior to 5.0 was based on FreeBSD 2.2.6. JUNOS between 5.0 and 7.2 (inclusive) is based on FreeBSD 4.2. JUNOS 7.3 and higher is based on FreeBSD 4.10. ...
8
votes
2answers
2k views

Is the shaping-rate on a CoS scheduler per-port or aggregate on a Juniper EX?

I'm using a Juniper EX2200 as demarc/CPE device for a customer that has multiple handoff ports on the one switch. I need to make sure that, across all their ports, they don't use more bandwidth than ...
8
votes
2answers
9k views

Juniper EX - disable multiple interfaces at the same time as a once off

I have used the Cisco interface range commands on many occasions to disable a large number of switching ports when the device is originally deployed as a once off and am looking for something similar ...
8
votes
1answer
828 views

Junos VRF equal-cost, multi-next-hop static routes not balancing

I am load balancing traffic on dual, same size links aggregating to the same VRF on the PE router (Juniper MX5 JunOS 11.4). Traffic from the CE (Cisco) is balancing nicely but I need get the reverse ...
8
votes
3answers
2k views

Determine what interface is replying to snmp replies

I have a Juniper MX router that is accepting SNMP requests. Problem is I am sending UDP requests to one interface, and it is replying on another. The target IP is that which is assigned to lo0.1 but ...
7
votes
2answers
3k views

Why are my equal cost LSP's not load balancing equally when using auto-bandwidth?

First, I'm adding this question and answering myself because this type of behavior was absolutely no where to be found, hopefully it will help someone. Problem: We use auto bandwidth to handle the ...
7
votes
1answer
608 views

Is CoS supported in a logical system?

This reference states that class of service is supported in a logical system, but another reference disagrees. This may be a disparity between versions, but I have notoiced there is no class of ...
7
votes
2answers
2k views

Juniper SRX - No traffic after 17 minutes

This is really a strange problem. I am trying to install a Juniper SRX 220H as the gateway to replace my old Cisco router in my testing network environment. The simplified topology is listed below: ...
7
votes
1answer
2k views

BGP authentication-key-chain vs. authentication-key

I found a neat little behavior on a Juniper box I was working with today. We were migrating from a Cisco ASR to an MX and all of our internet exchange peers that had authentication configured didn't ...
7
votes
1answer
4k views

Juniper EX 3300 Incorrectly Identifies SFP+ Transceiver Module

We have 2 Juniper EX 3300 switches operating in a stack. It is running Junos 12.3R3.4. The switches have 4 SFP/SFP+ Ports. On FPC 1, PIC 1, Xcvr 0 you see a description of "SFP-FC8G-SW." However, the ...
7
votes
3answers
1k views

Creating a JunOS firewall filter based on dynamic routing properties

One of my BGP transit customers has asked me for a solution to make it easier for him to blackhole traffic within our network when he's suffering from DDoS attacks. Usually, BGP blackholing is done by ...
7
votes
1answer
2k views

Why does export/import policy addition/removal cause a BGP session reset?

I was adding a new policy to both import and export list for BGP. Then I observed a bgp session reset. Can anyone explain this for me? The only change I made was to prepend a new policy to reject ...
6
votes
1answer
3k views

Junos: Policy-Statment and AS-Prepends

I am trying to create a policy-statement to prepend the local AS number 5 times (assuming it is AS1234) before advertising local routes up to a new upstream transit provider (no inbound traffic is ...
6
votes
1answer
600 views

Juniper MX-5 EOPE Drop Pkt Cnt Incrementing

When running show pfe statistics error on a a couple of MX platforms, I see the EOPE Drop Pkt Cnt counter incrementing on 6 MX's out of 22. I believe these are "End-Of-Packet errors", but can't find ...
6
votes
1answer
3k views

What is the jsrv.1 interface for?

I have a Juniper EX2200 switch running JunOS 10.4R4.5. Under Configure -> System Properties -> Management Access, I can configure which interface allow management access. There is a mystery ...
6
votes
2answers
343 views

Issues with Juniper MX-series iBGP routes

I have a simple setup: 2x Juniper MX-Series routers each having one uplink to a transit provider iBGP session between both routers (point-to-point) For testing purposes I've disabled the uplink from ...
6
votes
2answers
1k views

Can Junos show a matching config statement in context, like IOS `| section`?

Hard to describe what I'm asking. For example, here's a section of my config, with the full hierarchy: interfaces { ge-0/1/9 { vlan-tagging; unit 100 { description "my ...
6
votes
2answers
5k views

Juniper user creation and password

I have created the user in Juniper devices by below commands root@qfx5100# set system login user RO class super-user Now the user RO has been created and I have not given any password to it. But ...
6
votes
1answer
1k views

Terminating an L2VPN on JunOS router

I am trying to terminate an L2VPN on an MX480 but it's not working... Topology: 7206 trunk vlanid 555 > MX80> MPLS CLOUD > MX480. 7206 (192.168.254.2) not pinging lt-interface on MX480 (192.168.254....
6
votes
2answers
6k views

Juniper EX2200 can't boot

I recently acquired a Juniper EX2200-24T-4G switch, but I have some issues getting it up and running. When I power on the switch the boot process looks normal, but after some time it suddenly turns ...
6
votes
0answers
440 views

Maximum number of subscribers per FPC in Juniper MX

If link with subscribers, containing about 12000 clients, goes down. One aggregated ethernet containing two links which goes to two different FPC's. All clients try to authorize on JuniperMX with the ...
5
votes
3answers
5k views

Logging in to console port on Juniper EX2200

I have a Juniper EX2200 with JunOS 10.3R1.9 in a remote location, making it impossible for me to test. I will be on-site for one day and while there, I would like to login through the console port ...
5
votes
2answers
59k views

GNS3: Configuring/Emulating a Juniper Router on GNS3

I need to be able to emulate a Juniper Router (JunOS) on GNS3. I have seen that this is available as on option in the 'Node Types' list on GNS3. When I try to use this to add a Juniper Router to the ...
5
votes
2answers
2k views

Migrating from VLANs to MPLS on JunOS [closed]

I'd like to see a worked example of recreating a regular common VLAN based topology using MPLS on Juniper hardware. In particular we will be using EX3xxx and EX4xxx for swicthing, though I don't think ...
5
votes
2answers
380 views

Juniper: WakeOnLan over 802.1x without using default VLAN

Case We have a working 802.1x configuration on all our access ports. I want to enable WakeOnLan, but have no idea, how to target computers with Magic Packet. Tests We tried to send Magic Packet ...
5
votes
1answer
2k views

JunOS: View route-filter import policy matches

Is there a way in JunOS (I'm testing on 11.4R1.14) to see the prefixes filtered out by a policy statement? I have the following in the lab dropping unwanted prefixes from BGP neighbors; policy-...
5
votes
1answer
48 views

Junos how to execute a lot of repetitive commands?

In my Juniper qfx Switch, I want to execute many commands such as bellow: set vlans vlan77 vlan-id 77 set vlans vlan77 l3-interface irb.77 set vlans vlan78 vlan-id 78 set vlans vlan78 l3-interface ...
5
votes
2answers
590 views

Newer JunOS Versions numbers

What is the meaning of the new JunOS version numbers in the 12.1 line? 12.1X44 12.1X45 12.1X46 What does the XNN mean? How can I tell which one I want?
5
votes
1answer
2k views

How do you alias a command in JunOS?

I was searching for an easy way to do this over the last few days and found that there wasn't a SIMPLE way to do this. The majority of the answers were: Too complex for the problem at hand. ...
5
votes
1answer
7k views

Checking advertised routes - BGP

For IOS-XE and Junos, I wanted to know the command that displays the routes advertised by BGP to neighbors. On IOS-XR, this command is 'show bgp advertised'. I know on XE, per neighbor based ...
5
votes
1answer
235 views

juniper advertising smaller subnets with a bigger static route in BGP

I have a /18 in RIB but I would like advertise smaller subnet in BGPfor specific reason to diff ISP etc. Is there a way to do it without creating a null route or static route. Is some way in policy ...
5
votes
1answer
87 views

Disadvantages or risks of leaving the the family inet6 configuration under interface configuration in Junos applied

I have a corner-case where I need to leave the family inet6 configuration under IFL present while hosts in that network should not use IPv6. This means, that the logical interface of a router will ...
5
votes
1answer
143 views

PP BGP Load Balancing with JUNOS

So we've got a couple of BGP upstream providers, whom both are providing us with their full internet routing tables. What we are now wanting to do, is utilize both providers, rather than just one ...
5
votes
1answer
2k views

juniper snmp oid: Retrieve the list of interface with vlan no?

Below are the following commands I used to get the specific data that I need. Get Port Id and Interface snmpwalk -r:"switchName" -v:2 -t:10 -c:"*******" -os:"1.3.6.1.2.1.2.2.1.2" -op:"1.3.6.1.2.1.2....
5
votes
2answers
1k views

Proper connection and VLAN configuration between Juniper EX4300 and Aruba 7010 Controller?

I have a Juniper EX4300 switch that is connected to a firewall which in turn connects to the WAN. I have an Aruba 7010 Controller that I would like to connect to the Juniper switch. On the Juniper ...
5
votes
1answer
1k views

RSVP between Cisco and Juniper

I can not configure the RSVP between Cisco6509 SUP2T and Juniper MX480. Prior to that set up the neighbor 3 without problems. Now that it is impossible ...I do not understand why :( scheme: Cisco t5/...
5
votes
1answer
394 views

Juniper EX4600: multicast not working in vlan default. [closed]

I have a Juniper EX4600 switch which I'm using for host connectivity (obviously). Now I need to set up a VRRP/CARP between two hosts that are in the same vlan, and it's the default one. Surprisingly, ...
5
votes
0answers
835 views

Juniper SRX IPv6-PD update-router-advertisement issues

I'm trying to get some sweet prefix delegation working on my SRX. My provider offers DHCPv6-PD and gives out /56 addresses. I have done setups using cisco routers and am trying to replicate it onto a ...
4
votes
1answer
64 views

set cli complete-on-space Cisco equivalent

Does anyone know what would be the equivalent, if any, of the Juniper command set cli complete-on-space for Cisco? I used to work with Juniper devices and I LOVED this feature, but now we are ...
4
votes
1answer
3k views

Isolating Juniper Management Plane

Out of the box, it seems that the Juniper management routing is part of the default route table. Can I use logical systems to isolate the service plane from management routing? Are there any drawbacks?...

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