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Questions tagged [junos]

Junos Network Operating System

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VLAN with trunk to avoid broadcast storm in a network with redundant paths

I have 6 Juniper switches (EX - 2200) connected to each other as shown in the network topology. I have two PC's that I am using PC1 - (used for configuring the 6 switches via minicom) PC2 - to monitor the traffic between the switches via the Ports…
liv2hak
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Login configuration script for Junos EX 2200 using minicom

I am connecting to Junos OS on Juniper EX-2200 switches using minicom as shown below minicom -C log_sw1 sw1 Now I have a series of commands that I need to execute on sw1.(example shown below) cli request system zeroize show config show…
liv2hak
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Configuring VLAN on Juniper EX2200 switches

I have a Juniper EX2200-24T switch.It is configured as an L2 switch (i.e the interfaces are configured in such way that they do not have an IP address.).I have manually connected the port ge-0/0/0 of the Switch to my PC eth0 port. I want to create a…
liv2hak
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Routing between SRX220 and existing network router

I've got a Juniper SRX220 that I'm trying to connect between our existing network and the new networks on the Juniper side. However, no matter what static route I try and set, traffic doesn't cross between them. What I'm trying to achieve is routing…
Mark Fisher
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How can I disable console password-authentication on a Juniper EX4500 switch?

I am building a system that automatically configures Juniper and Cisco switches from the console based on user input from a web UI. I will have a full-time console connection to these devices; however, on occasion the server must be rebooted...…
Mike Pennington
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Juniper J4350 out of order

I have got two (2) Juniper routers J4350 that are out of order : All the interfaces are down (leds on the interfaces don't ligthen, ping dosen't respond) No output on the console port (even when booting) I've tried to reset the router (holding the…
Benjamin Baron
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Why is my JunOS firewall filter cutting off management access?

We've recently installed a second Internet connection so I've somewhat successfully configured policy based routing on the edge router which is a Juniper J4350 running JunOS 9.5R1.8. I followed a guide more or less exactly by example (found here:…
James Yale
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How to change the 'internal IP address' of a Juniper SRX210H

How do I change the 'internal IP address' (Not the WAN IP) (192.168.1.1) to something else via the 'Juniper Web Device Manager'? Thanks!
Justin
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Multicast NAT on Juniper router

I am trying to do source NAT on a J-series router (junos 9.2). I have two separate NAT rules setup (using security policies + source-nat interface). One is for regular unicast TCP connections and the other is for UDP multicasat. The two rules are…
John
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Arp tries on various *nix based systems

Does anyone know what determines the amount of arp tries a router will make? I have different behaviors with two devices, if I try to traceroute to a non-existent host on a subnet that belongs to an interface on the router, a Linux box will try to…
salparadise
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Junos custom-attack signature pattern syntax

I am stuck at a point with the configuration of a custom-attack signature in Junos. According to the Junos Custom Attack Definition documentation page, I can set up a custom attack based upon a signature in the packet. In the documentation you can…
James Hawkwind
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Juniper LACP with linux server not increase speed

And: I'm using R630 with Debian 11 and Ex2200 with version 12.3R12.4 The network: each server using 4 link to sw server 1 ==== switch ==== server 2 Here is server config ( both server ) auto lo iface lo inet loopback iface eno1 inet manual…
Alceatraz
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How to force 1G speed for Juniper QFX5100 10G ports?

I have available a Juniper QFX5100-48S switch (48 SFP 10G ports, 6 QSFP ports) that I cannot join into our network since an SFP DAC 10G cable connecting it to an SFP port on a HP V1810-48G switch does not work (the web panel on the HP switch says…
Francesco
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Virtually no bandwidth via Juniper QFX5100 switch

I have a Juniper QFX5100 with pretty much stock configs. I am using aggregated interfaces between them. When I use a cross over between the servers everything works fine and I get 10GB of bandwidth. When I go through the Juniper QFX5100 I barley get…
Dovid Bender
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