Questions tagged [juniper]

A tag for questions involving Juniper Networks hardware or software.

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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
51 views

Does Juniper have an equivalent of 'show security pki local-certificate' for remote certificates?

On a Juniper Firewall, the command show security pki local-certificate will give all sorts of detail for a local certificate. (The sort of certificate you would use to stand up an IKE connection) My ...
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1answer
33 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
44 views

juniper vlan-ccc vs ethernet-ccc for eompls

In juniper ethernet-ccc transports customer's vlan end to end. Does vlan-ccc also transport customer's vlan across as well? thanks.
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1answer
61 views

Juniper EX2300 QinQ questions

I am trying to set up a Q in Q environment with EX2300(ELS). Unfortunately, I receive the error message down below when I enter commit check [edit interfaces ge-0/0/0] 'unit 0' VLAN-ID must be ...
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1answer
28 views

Juniper SSG20, reset to factory default

I have an Juniper SSG20 that I have tried to reset to factory default. I have tried the pin hole reset method but to no avail, and the serial console doesn't indicate that the procedure is started, ...
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1answer
68 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
38 views

Why the `policy-options prefix-list` do not shows hierarchy?

Why the policy-options prefix-list do not shows hierarchy? In a Juniper Router, I show policy-options, there shows: prefix-list snmp-permit { 1.1.1.0/24; } prefix-list icmp-permit { 2.2.2....
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1answer
34 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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0answers
33 views

How to analysis the below situation, is the too many switch trunk connect caused this issue?

I have two Juniper EX switches, and the Juniper-EX-01(ge-0/1/1) connected to the Juniper-EX-02(ge-0/1/0). I want to check is there any optical attenuation problem, or other link errors. admin@...
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1answer
152 views

How to show a Juniper interface bandwidth usage?

I want to check a Juniper Switch's port bandwidth usage. I tried show interfaces, but there is no current bandwidth condition: admin@Juniper-ex3300-48t# run show interfaces ge-0/1/1 Physical ...
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1answer
144 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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1answer
183 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
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1answer
97 views

Ip telephone being not served by DHCP

I have a DHCP configured on juniper router srx345 and an external DHCP runing on win machine and configured by telephony ppl. I'm using an IP tel Astra i740N when I send DHCP request to DHCP ...
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2answers
87 views

There have uncommitted changes, but `show | compare` do not show it

There have uncommitted changes, but show | compare do not show it. {master}[edit] un@HK-MX-RE0# exit ...
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1answer
56 views

Juniper SRX 340 configuration import/export

Good morning, I have a Juniper SRX 340 Cluster (15.1X49-D70.3) in a professional environment, and a third firewall (same model) that I'd like to use as a test firewall. Is there any simple way to ...
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1answer
47 views

Juniper Ex4200 problem with assign firewall to access port

This is my firewall filter rules : family ethernet-switching { filter port5 { term port5 { from { source-address { 192.168.1.0/29; ...
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1answer
36 views

In IP6 fe80::8a10:8fff:feb7:1632 > ff02::2: ICMP6, router solicitation , length 16

When I use command to capture the packages of interface ae52.0 in my EX4300 gateway Switch (L3): run monitor traffic interface ae52.0 I get many In IP6 fe80::8a10:8fff:feb7:1632 > ff02::2: ...
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124 views

Why my ae interface Link type is down but the physical interface is up?

Why my ae interface Link type is down but the physical interface is up? In my convergence layer Switch, I use two Juniper EX4300 devices realize the Stack: so there have xe-0/0/x and xe-1/0/x ...
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1answer
100 views

Multicast in one VLAN

I need to receive multicast traffic over L2 segment on my client machine. But for some reason I am unable to do it. To my understanding with such scheme I should receive traffic if inbetween Juniper ...
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0answers
28 views

Juniper EX Switch sending TCP reset on SSH connection randomly

So as stated in Title I'm observing that one of our switch randomly send RESET flag in TCP and ends the ssh connection in the middle and sends and Window size of 0 as well. Randomly it refuses to ...
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1answer
34 views

Why does this setup fail sometimes with Juniper EX4200?

I've got a very straight forward setup with the following devices: 1 x 10G Fibre uplink (internet) 1 x ASUS AC68U wifi router 1 x EX4200 20 x Servers (With IPMI and single ethernet) The EX4200 is ...
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1answer
24 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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1answer
43 views

How to use the monitor traffic only shows the In packages in Juniper EX480?

I use monitor traffic tool: run monitor traffic interface ae16 commad: 19:04:52.820205 Out arp who-has 16.23.40.133 tell 16.23.40.134 19:04:52.820210 Out arp who-has 43.243.33.66 tell ...
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1answer
54 views

Is there a way of Juniper to avoid the vast ARP requests?

In my Juniper router the interface always send ARP requests for some non-using IP address. Is there any issue there? and whether there is a way of Juniper to avoid the vast ARP requests? Is it ...
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1answer
61 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
81 views

My Juniper Router arp do not work, after clear MAC then it can work

In my MX Juniper router device, there have the IP 16.213.40.1's address: {master} admin@juniperMX> show arp no-resolve | ...
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2answers
76 views

Is it possible to limit a IP's traffic in gateway Juniper switch?

In my gateway Juniper Switch: ... irb { unit 0 { family inet; } unit 2 { family inet { address 10.10.10.254/24; } } unit 9 { family ...
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1answer
84 views

Juniper port forward range of ports with dynamic pppoe

I have Juniper SRX300. Due to some restrictions, i can't use static WAN IP address. I need to port forward a range of ports and it's working only using nat static section like this: username# show ...
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1answer
207 views

Juniper MX: Leaking routes from RIB into VRF

Aim We have a firewall terminating IPSec VPNs to AWS. These are used in the event of failure of a pair of AWS Direct Connects. Currently, the VPNs are routed to AWS over the same Direct Connects ...
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1answer
101 views

High CPU utilization on Juniper ACX2100 chassis fpc

What is the cause of high utilization of cpu on fpc.Below is the output of which depicts utilization as 99 but router is running just fine. show chassis fpc Temp CPU ...
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1answer
77 views

PE route down in LDP based VPLS Connection in Juniper MX

I am observing 'PE route down message ' against LDP based VPLS connection on Juniper MX. The IGP protocol is IS-IS. LDP VPLS connectivity is point to point (having only two end points). When I check ...
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1answer
126 views

High Memory Utilization in Juniper ACX2100

Recently i observed that one of our juniper AC2100 has only free 3% of memory.But i'm unable to understand which thing is causing such high memory usage or what i can do free the memory so it won't ...
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0answers
55 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
71 views

Juniper EX4500 selective q-in-q

This switch supports selective qinq? For example I got 3 vlans on client port: 100, 200, 300. I need to add second tag on vlans 100, 200 but vlan 300 must run as is, without adding second tag. Is it ...
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1answer
94 views

Weird Juniper switch behavior

Weird Juniper switch behavior I have bought EX4300 and SRX300 on ebay to study it and started to read documentation. After some time i wanted to test my knowledge and configure it to test it at home. ...
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1answer
115 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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0answers
125 views

I can not login to Juniper EX4300

I my heap-up EX4300 Switch, I set the system login user admin, and a plain-text password, this is my configuration: {master:0}[edit system] ...
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0answers
33 views

Juniper QinQ same port for customer as provider

Is it possible to use a single interface as both the provider port and the customer port for a QinQ setup on a Juniper EX 4200 switch? I have a set of switches "on a stick" attached to the network. ...
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53 views

Why the ae1's `Link` is `down` but its indicator is light?

In my Juniper EX4300 I created a ae1 I added xe-0/2/3 and xe-1/2/3 to ae1, xe-0/2/3 { ether-options { 802.3ad ae1; } } xe-1/2/3 { ether-options { 802.3ad ae1; } } ...
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1answer
37 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
454 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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0answers
131 views

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

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
144 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
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1answer
130 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
167 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
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1answer
192 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
183 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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3answers
303 views

Why the last AS PATH item always is `I` or `?`? [duplicate]

you see my snapshot from m Juniper Router, I want to find the routes of 114.114.114.114, but there always get Idle or a ?, why:
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1answer
507 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 ...