EX4550 lots of mac learning and delete within 2 sec
Hi, Im having some, to me, strange behavior with a EX4550-32F series Virtualchassis. We have it running on the 12.3R6.6 Junos and in a VC setup (2 switches). On this, we have give or take 27 LACP...
View ArticleEX bug
Hi Is anyone familiar with this king of problem ?When there unexpected power problem in the site and the EX swich do reboot , we can't log into it again .When modifying configuration on vlans on the...
View ArticleEX3300 Virtual-Chassis: ARP entries listed as permanent in client-vlan
Hi There! A customer is having problems with a VC of four EX3300. It seems that the ARP table for the client vlan is corrupt because all the clients in this vlan are flaged 'permanent' instead of...
View Article802.1x auth failed but client gets access to voice VLAN
Hello, we have deployed multiple switches with access ports configured for voice vlan and 802.1x auth. As failover guest vlan is configured. No we have encountered that even if the voip client fails...
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DHCP Relay
Hello Community, Im trying to successfully setup a DHCP relay on an SSG140. Im confident that I have things setup correctly on the firewall, however I suspect that my EX2200 switches inbetween the...
View ArticleCoS; ethernet-switching firewall filter; source port and not destination port ?
Hi community,At, http://www.juniper.net/techpubs/en_US/junos12.3/topics/example/cos-ex-series-configuring.html, I couldn't help notice the ethernet-switching family firewall filter rule-set marks...
View ArticleWhy is 802.1X on trunk ports not supported?
So a bunch of security critical VLANs terminate at our WLAN access points (the APs themselves are 802.1X enabled in regard to wireless clients). Hence, all an attacker needs to do is unplug an AP, plug...
View ArticleNo Ethernet Switching - vSRX Firefly with Virtualbox
Hi all, I just wanted to have a hands-on experience with Juniper ethernet switching using virtual box. One of the options was to use vSRX firefly. But unfortunatley it provides limited support...
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VLAN routing between different IP segments not working
We are bringing online a new virtual switch core in our colo, this will eventuall be our production stack.In the picture, we have CORPORATE, current production. Then the Data Site Orlando - COLO is...
View ArticleNew EX4300 stack - [14.1X53-D35.3 problems
We have installed EX4300 - 4 switches in stack. Also to that stack are connected other IDF's EX3300. We switched from cisco to juniper and since that time I have noticed aerohive access points are...
View ArticleAmplify from 3 Mbps to tens and hundreds Gbps
If you need some performance test for your equipment and if you have a Juniper EX switch, for example EX4550, you can do it very easy. You can amplify from 3 Mbps to tens and hundreds Gbps. Today I...
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Layer-3 VLAN Routing issue need help
Trying to connect our COLO with our DSO location.We have connectivity from our Corporate site to our COLO site, both directions work great. I am unable to ping the DSO from the COLO. Any reason why.?...
View ArticleDetect shot DDOS using RMON on 10G interface
Hello, currently we are experiencing a lot of very short but strong ddos attacks. i would like to setup a rmon alarm that detects anything over 5gbit/s. we are using a mixed stack with ex4500 and...
View ArticleLAG plus QinQ on EX4300
Dear expertsA customer of mine is asking me to connect two EX4300 in different sites (one in site A and one in site B) using their Metro Ethernet infrastructure and hence with ether-channel links to...
View ArticleEX2200: How to find out ip address for port
I have device connected to port ge-0/0/5 which is apart of a vlan on my EX2200. The device has a static ip address assigned to it. I forgot the ip address and I need to ssh into that device, is there...
View ArticleVirtual-chassis and Adaptive Load Balancing
HiI'm trying to understand if Juniper VC (QFX5100), as VCF does, support ALB... here the VCF reference:...
View ArticleMac address aging out by Port Level
Hi,Anyone know of Junos equivalent command for the following Cisco port security command :- switchport port-security aging time 120 type inactivityUnderstand that our EX/QFX can perform the mac aging...
View ArticleIPv6 ND Stale Entries
I am having a EX2300 device wherein 'show ipv6 neighbor' entries are shown as Stale until some ping traffic comes in. Is it expected? This is the configuration I have,set groups ND system arp...
View Articleex2200 vlan and simple l2 router
HiI have small office with ex2200 poe switch and and simple L2 router (do not support vlan)Can I config the ex2200 switch so it will have 2 vlan that can go to internet ?
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Can't ping my lo0 on switch from computers attached to vlan on that switch.
Thanks to those who browse these questions and find value and enjoyment from helping others. MY GOAL: monitor SNMP events on ex2200-c from NMS in local vlan.STUCK POINT: Can't even ping from vlan to...
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