Questions tagged [juniper-junos]

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

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PEM Modules Redundancy in Juniper SRX3600 series Firewall

We have Juniper SRX3600 running in our network. At the moment only 2 x PEM Modules (AC Power Supply) are installed in the chassis while other 2 x PEM are not. This is shown below from the output of '...
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1answer
38 views

What's the point of aggregate routes when the default preference is reject?

studying for my JNCIS-SP and finally digging into the minutiae. I'm trying to grasp the default behavior of aggregate/summary routes. Why are these a reject? Maybe I'm just using them wrong, but here'...
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2answers
36 views

juniper router /var directory is full , deleting .tgz file in root directory

i need to free some space on my juniper router , in the root directory when i use >ls -lash command i see a .tgz file which is 405 M , my question , if i delete this will it cause any problem ?
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48 views

JunOS: How to copy the config file to TFTP server?

Model: j6350 JUNOS Software Release [12.1X46-D65.4] Is there an easy way to copy the config file to TFTP?
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1answer
71 views

Can't log in after admin password change

I reset my admin password with below command: #Set system login user admin authentication encrypted-password <new password> But now i can't login to my device, what can be the reason?
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22 views

router not learning the default route announced by RIPv2 if the same route exists via a better path

Let's say, that one has a following simple network topology: r1 ◄ ► r3 ▲ ▲ ▼ ▼ r2 ◄ ► r4 All four routers speak RIPv2 on all interfaces. r1 and r2 announce the default route which means ...
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31 views

NTP Sync issues between Palo Alto 3260 and Juniper MX10003

I'm using a Microsemi S650 as the primary ntp server and a Juniper MX10003 as the secondary ntp server. I have the palo alto 3260 configured as follows: [edit deviceconfig system ntp-servers] ...
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2answers
37 views

How to view a privilege level attached to a command in Junos?

According to Juniper documentation, each top-level CLI command and each configuration statement has an access privilege level associated with it. Is there a command which allows one to see the ...
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1answer
48 views

Juniper SRX Application Inactivity Timeout

Will the inactivity timeout set for the application "TCP-ALL" of 900 trump the default value of 1800 for junos-ssh if the application-set were matched in a security policy? Does it matter if the order ...
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1answer
29 views

Juniper vMX logical system

Can some one please tell that Juniper vMX supports how many logical system? Some one mentioned on Juniper forum that it supports 15 Logical systems but in case of 3 Logical systems configured , 2 were ...
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48 views

Junos: how to change BGP MED for secondary node?

I have vSRX cluster, which announce some protected addresses over IBGP. Each node has two sessions with two routers. (I use ge-0/0/1 and ge-7/0/1 for that). I found that if fail-over happens, and ...
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228 views

JunOS: FPC Major error alarm

I hope everyone is doing fine! This morning I've run into a problem. My uplink interface went down for unknown reasons. Upon checking system alarms I see this: show system alarms 1 alarms currently ...
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2answers
292 views

How to choose the most recommended Junos release for MX router

How to choose the most recommended Junos release for MX router? I need to choose a Junos OS release to update my Juniper MX960 routers from release 18.1R3, but I cannot find a procedure or best ...
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51 views

Managing a Juniper EX4300 In Band

Currently, our ex4300 are managed in band using irb.20. show configuration interfaces irb unit 20 { family inet6 { address 2001:db8:1::252/64; show configuration routing-options rib inet6.0 {...
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1answer
42 views

If accept IP address term before discard port term, will the IP's port still be discard?

In my Juniper Router MX480's firewall filter DENY-EMAIL-PORT: dele@MX-RE0# show firewall filter DENY-EMAIL-PORT term ALLOW-IP { from { address { 102.100.100.1/32; ...
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34 views

CA certificate and Local certificate

There is something which is bothering me when i think about the CA cert and Local cert. Below are my queries which pertains to juniper but may be generic as well. 1) "request security pki ca-...
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1answer
64 views

Will the router crash when it is sent routes that it can't design to hold?

I am working with a Juniper router which has the capacity to hold 60M routes in the RIB and 4M routes in the FIB. Should the router crash when more than 4M routes are being sent to FIB, considering no ...
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45 views

Why doesn't kernel itself had entire L2/L3 protocol stack? [closed]

I know kernel itself handles protocols in layer 2, layer3 and layer 4 at ipv4 stack, but why can't kernel itself doesn't have protocols such as STP/RSTP/xSTP/OSPF...etc, implemented. Why should we ...
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176 views

Deny ssh access from CPEs in all routing-instance - Juniper MX960

I try to deny ssh access from routing-instance CPEs in Juniper MX960 device. I want to know if there is a way to deny only ssh access attempt from any routing-instance.
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1answer
58 views

ex4200 bootup warning

we have some old juniper ex4200 in our stock and it shows following warning in console : --- JUNOS 12.3R3.4 built 2013-06-14 00:08:02 UTC *************************************************************...
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1answer
84 views

Junos, accidentally deleted a FIB entry, how to re-add?

while i was testing Junos in a virtual environment, i accidentally deleted an entry in the forwarding base (do not clearly remember which command i used to let that happen), but because of this the ...
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1answer
39 views

Where the `term` and `policer` would appear?

Where the term and policer would appear? In juniper, there have filter, term and policer. I know the filter is under firewall, but how about the term and policer? how to understand the concept? I ...
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1answer
152 views

How to bypass when network speed over a special number in Juniper?

I have a requirement, such as I have 113.100.15.0/24 segment IP addresses. in Juniper M480 Router I connected to BGP-A(1G) and BGP-B(10G), by default the 113.100.15.0/24 out the Router it go ...
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201 views

What is the point of Junos outbound SSH service?

Junos outbound SSH service makes a SSH connection from network device to SSH server. What is the point of this? Does it allow the server to somehow make the SSH connection back to network device using ...
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1answer
977 views

what do em0, em1, em2 and em3 interfaces refer to on Juniper routers

Can someone explain what these interfaces are for? I know em0 is used as a management interface on the router to connect via ssh but why are the other two there? I have also noticed, sometimes they ...
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1answer
108 views

Wildcard to match JUNOS

Hi I am trying to match routing instances with names other then VPLS-* basically any name that starts with V* but is not VPLS-* I tried multiple different iterations of below but it seems to ignore ...
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1answer
319 views

Junos OS Upgrade on EX4200 Virtual Chassis

We have couple of EX4200s switches in Virtual Chassis mode running in the network. Each Virtual chassis has only 2 member switches. We are required to upgrade the Junos OS on each member switch in ...
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31 views

Filtering http/https traffic destined for a juniper router

I need to find a way to harden my network so that all juniper routers reject web management and any http / https traffic that is destined for them specifically. This is what I came up with so far: ...
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3answers
411 views

JunOS, access mode interface asks for a vlan

I'm kinda new to networking so I'm going to do my best to try explain my issue. The issue that I have is that I want to delete all default configuration for my xe interface. Current configuration: ...
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1answer
153 views

How to do port mirroring in Juniper EX2200 switch

I am using Juniper EX2200 switch, one of the connected System generating lot of unwanted traffic ( varying from 10 Mb to 25 Mb upload traffic). I wanted to analyse those traffic using port mirroring ...
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1answer
97 views

Juniper SRX sniffing

I've a Juniper SRX 340 Cluster (15.1X49-D70.3) on which I have to do some debug. I know how to sample packets on interfaces and my question is: is it possible to sample traffic at the same time on ...
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1answer
277 views

EX3300 can not use irb.x, so how to access the layer-3 address?

EX3300 can not use irb.x, I have a Juniper EX4300 convergence layer Switch, in it there are irb interfaces. such as irb.3, and if I have another EX4300 for access layer, I can set vlan l3-interface ...
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1answer
43 views

Every `aex` have a `aex.0` in my QFX5100, why?

When i show interface terse in my Juniper switch qfx5100: .... ae29 up up ae29.0 up up inet 192.168.9.2/24 ae30 up up ae30.0 ...
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1answer
893 views

The irb interface can not ping in EX4300 itself

In my Juniper EX4300 I created a irb.2 with address 10.10.10.110/24 irb { unit 2 { family inet { address 10.10.11.110/24; // the snapshot is wrong, I changed to 10.10.11.110/...
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229 views

What's the uplink port shows in the `show interfaces terse`? [closed]

My Juniper EX4300 have four uplink port: but when I show interface, there only two xe port: Interface Admin Link gr-0/0/0 up up pfe-0/0/0 up up pfe-0/0/0.16383 up up ...
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2answers
433 views

What's `irb` meaning? and what's the difference between it and `vlan`?

What's irb meaning? and what's the difference between vlan? I found some Junos version the vlan l3-interfaces should be vlan.xxx, and some times there is irb.xxx. irb { unit 0 { family ...
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1answer
337 views

Juniper Radius Configuration

I'm trying to figure out how to setup radius on a Juniper EX2300. The juniper can reach the server no problem, but when I run the 'test aaa authd-lite user [user] password [password]' command, I get ...
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1answer
391 views

How to change AD on Juniper router?

I have this route on my Juniper Router and some destinations have two routes: OSPF and BGP. I want to change the administrative distance for the BGP route so that it will be smaller than the OSPF ...
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1answer
125 views

Rate Limit on Main Aggregated Interface (AE) without applying on Unit Level in Juniper MX

I want to apply rate limit on Main Aggregated Interface (AE) without applying on unit level. We have a customer connected with our Juniper MX480 via 100G Interface. The single 100G interface is a part ...
4
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1answer
315 views

Dump traffic on routing-instance with a Juniper SRX firewall

A Juniper firewall can display data with the tcpdump command: % tcpdump -i ge-0/0/0 % tcpdump -i vlan10 However, if the interface or the VLAN is assigned to a routing instance, the traffic is not ...
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1answer
407 views

How can a Juniper Router update its arp table?

I know the ARP table is cached data. On Juniper, we can use show arp to query the arp table: admin@juniper> show arp | match "16.23.43.75" ac:1f:6b:90:d1:ca 16.23....
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1answer
771 views

Advertise all static route except the default gateway with Juniper SRX firewall

With the following policy, all static routes are advertised via BGP to my neighbor: root@Nitrogen# show policy-options policy-statement bgp-export-policy { term export-statics { from ...
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0answers
192 views

Memory Utilization inceased on Routing Engine in Juniper MX

We recently faced high memory utilization on primary RE of Juniper MX. I have attached graph of Memory Utilization . It was as a result for copying some files from Backup RE to Primary RE (This is ...
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2answers
173 views

Junos[MX]: How to show VPLS instance associated with given subinterface

Suppose I have a subinterface with Vlan-vpls encapsulation, like this one: admin@router> show configuration interfaces ge-2/1/1 flexible-vlan-tagging; encapsulation flexible-ethernet-services; ...
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1answer
294 views

Juniper SRX Destination NAT for L2TP server

I have a L2TP server on my LAN which I would like to access from WAN and there is a Juniper SRX standing between these two networks. I've had some success with this post: https://forums.juniper.net/t5/...
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1answer
588 views

IPv6 default route not being installed from RA

Platform: Juniper SRX300 Version: JUNOS 15.1X49-D160.2 ISP: Midco I currently have an issue where the IPv6 default route is not being installed from the CMTS RA. Try as I might, I cannot get ...
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218 views

mLACP / MC-LAG between Cisco / Juniper

I am working on a LDP signalled VPLS topology (picture) What I am trying to accomplish here is to establish a redundant connection to CE1. CE1 has both interfaces in a port-channel with an IP. My ...
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1answer
150 views

Site-2-Site Juniper SRX & Zywall

I've a Juniper SRX 340 on my datacenter and a Zywall USG 100 on my office. I'd like to build a site-to-site VPN between them, but after a lot of tries I can't still reach the result. This is the ...
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1answer
2k views

how to copy the config of one port to another port on juniper

how to copy the config of one port to another port on juniper ? 1) how to see all the configs that are applied to the port (ex: xe) 2) then how to copy the config of this port to another port ? ...
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1answer
448 views

Juniper EX4200 QinQ question

newbie here with a very similar question to one that was posted a couple of years back ... only slightly different (so, as the original question was asked so perfectly, I've copied it nearly verbatim ...

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