Questions tagged [juniper-junos]
A tag for questions involving Juniper Networks Operating System (Junos) software.
264
questions
2
votes
2answers
34 views
RE Protection vs DDOS Protection in Juniper MX series routers
Hi Everyone,
Need to know the clear differences between RE protection and DDOS protection in Juniper MX. Both are used to save routing engine from depletion of resources. As mentioned in Juniper MX ...
1
vote
1answer
21 views
Virtual Chassis Setup in Juniper EX4200 Using Mixed Interface Types
We want to setup Virtual Chassis using 2 x Juniper EX4200 switches. In case of Virtual Chassis for EX4200 , we have to use 2 x VC cables (connected back to back) between 2 x Ex4200 switches along with ...
1
vote
1answer
37 views
With regards to Juniper Networks , how does 'targeted-distribution' knob works?
Can someone please explain how does the knob 'targeted-distribution' works in Juniper MX routers.
We created aggregated Ethernet (AE) links on our Juniper MX router acting as BNG. However , after ...
3
votes
2answers
36 views
Why does Junos find multiple next hops only for the active prefix in case BGP multipath is enabled?
I have a Juniper router named r3 with one established eBGP session to router t1(172.16.0.14) and with second established eBGP session to router t2(172.16.0.18). BGP configuration of r3 can be seen ...
1
vote
1answer
46 views
Juniper vMX Routers can't ping each other in GNS3
I have a couple of VMX Routers setup in GNS3 that are directly connected on their interface, ge-0/0/2 and they can't ping each other. PFB configuration. I can't seem to find the problem!
UPDATE: Added ...
2
votes
1answer
34 views
Junos not automatically advertising an address configured on loopback interface to OSPF
According to JNCIP study guide(page 156) from 2003, the Junos should advertise a prefix on lo0.0 interface to OSPF if the RID is not manually configured:
JUNOS software automatically advertises a ...
0
votes
1answer
27 views
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 '...
0
votes
1answer
45 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'...
0
votes
2answers
44 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 ?
0
votes
1answer
177 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?
0
votes
1answer
86 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?
0
votes
0answers
23 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 ā āŗ r3
ā² ā²
ā¼ ā¼
r2 ā āŗ r4
All four routers speak RIPv2 on all interfaces. r1 and r2 announce the default route which means ...
0
votes
0answers
35 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]
...
2
votes
2answers
59 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 ...
2
votes
1answer
99 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 ...
1
vote
1answer
43 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 ...
0
votes
1answer
55 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 ...
0
votes
1answer
473 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 ...
1
vote
2answers
486 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 ...
0
votes
1answer
100 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 {...
2
votes
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;
...
2
votes
0answers
35 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-...
1
vote
1answer
65 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 ...
0
votes
2answers
46 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 ...
0
votes
2answers
248 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.
1
vote
1answer
73 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
*************************************************************...
0
votes
1answer
99 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 ...
1
vote
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 ...
3
votes
1answer
153 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 ...
0
votes
1answer
251 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 ...
1
vote
1answer
1k 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 ...
2
votes
1answer
137 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 ...
1
vote
1answer
377 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 ...
0
votes
1answer
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:
...
4
votes
3answers
487 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:
...
1
vote
1answer
183 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 ...
2
votes
1answer
121 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 ...
1
vote
1answer
322 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 ...
3
votes
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 ...
0
votes
1answer
1k 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/...
1
vote
0answers
252 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 ...
3
votes
2answers
632 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 ...
3
votes
1answer
419 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 ...
0
votes
1answer
473 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 ...
4
votes
1answer
141 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
votes
1answer
337 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 ...
0
votes
1answer
458 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....
4
votes
1answer
829 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 ...
2
votes
0answers
219 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 ...
2
votes
2answers
191 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;
...
