Traps on a EX-2300 switch - BPDU - how to send a trap on enable
We are working on getting notifications for ports that go into a BPDU state when a loop happens. And once again the newer EX-2300 switches are causing issues. (I really hate how inconsistent these...
View ArticleRe: EX4200 VC won't commit after a member core dump
Unfortunately, the booting to the alternate slice did not help. I ended up having to install from USB and formatting the disk in the process:...
View ArticleRe: EX 4200 in virtual Chassis keeps rebooting
No sure if its related but everytime the switch reboots it member 0 falls back to the older firmware that is on the backup flash, upgraded the switch the primary partition is on 15.1R7 and the backup...
View ArticleDrops on Output Errors - EX3400
Hi all, I have a server connected to an EX3400. The server is at 1g/Full-duplex (autonegotiation). However, I am seeing the following errors Input errors: Errors: 0, Drops: 0, Framing errors: 0, Runts:...
View ArticleRe: Drops on Output Errors - EX3400
It looks to me like it's dropping traffic only from the BE queue.Do you have any class of service configured? Please run:show configuration class-of-service
View ArticleQuestion on storm control
Hi everyone. https://www.juniper.net/documentation/en_US/junos/topics/concept/rate-limiting-storm-control-understanding.htmlAccording to the documentation above:"A traffic storm is generated when...
View ArticleRe: Drops on Output Errors - EX3400
Hi Luke, following is the output.XYZ@123> show configuration class-of-service host-outbound-traffic { forwarding-class network-control; }
View ArticleRe: Question on storm control
Hello, The best example I can see - ARP broadcast (and all related to these issues)...
View ArticleQFX5100 GigabitEthernet (SFP-T) LED Status and Chassis hardware absent.
Hello. On qfx5100-48s switch LED status and Chassis hardware status absent after upgrade JunOS starting from version 19. For example, with version 18.1R3-S6.1 - LED Status is blinking and "show chassis...
View ArticleBetreff: QFX5100 GigabitEthernet (SFP-T) LED Status and Chassis hardware absent.
Hello, it seems that your SFP-T with the S/N MTC230307WR is not a Juniper original SFP-T. 3rd party transceivers can work, but it is not guaranteed that they work. Sometimes there is some code change...
View ArticleBetreff: QFX5100 GigabitEthernet (SFP-T) LED Status and Chassis hardware absent.
pestov82@gmail.com looks like something changed in 19.x/20.x code to make the recognition of the 3rd party SFP no longer be recognized. Just FYI, there should be no Junos code that 'disallows' any SFP...
View ArticleRe: Question on storm control
Thanks Andrei. But receiving devices don't respond to ARPs with their own broadcast messages. I'm trying to figure out this sentence from the documentation."each message prompts a receiving node to...
View ArticleRe: Question on storm control
Hello https://ijcsi.org/papers/IJCSI-8-2-456-460.pdf This is one of the documents that describe them. The ARP storm is just one of the possible reasons. BR,Andrei
View ArticleQFX - ip helper - Requires explanation
Hi everybody, I do understand why a lot of people would prefer working on Cisco. I need my client to boot from my PXE server on another subnet and I spent my day searching how to do it ... With a...
View ArticleRe: QFX - ip helper - Requires explanation
Hi, Check this document, it has configuration for dhcp/bootp relay. Tim
View ArticleRe: QFX - ip helper - Requires explanation
Greetings, Juniper actually have some good articles explaining how to configure a pxe boot with multiple dhcp servers. See the next example that I have with me from previous scenarios; set...
View Articleinit: %AUTH-1: getty repeating too quickly on port /dev/ttyu1, sleeping 30 secs
It would seem the config file needs to be corrected in the build. So this will need reapplied after a reboot.Ive seen this on 20.1R1-S3.3 and 20.2R1-S2.1Here is my quick fix. run start shell user...
View ArticleRe: Traps on a EX-2300 switch - BPDU - how to send a trap on enable
Hello, Just as an idea, try this one https://www.juniper.net/documentation/en_US/junos/topics/usage-guidelines/automation-using-correlated-events-to-trigger-an-event-policy.html or...
View ArticleRe: Traps on a EX-2300 switch - BPDU - how to send a trap on enable
Interesting... I'll have to look at these a bit more closely. But I'm not sure you can correlate it with an UP event(?). There's no guarantee that port(s) you are looking for will come back up to an...
View ArticleRe: Traps on a EX-2300 switch - BPDU - how to send a trap on enable
I see the point. You can also look on this one: https://www.juniper.net/documentation/en_US/junos/topics/example/junos-script-automation-event-policy-triggering-using-nonstandard-syslog-messages.html...
View ArticleRe: Traps on a EX-2300 switch - BPDU - how to send a trap on enable
The:Using Nonstandard System Log Messages to Trigger an Event PolicyLooks promising. I'll have to try that since I do know what the log message looks like. I should be able to get that to work. But I...
View ArticleRe: vQFX10k 15.1X53-D60 BGP (EVPN and route target) BUG
Hi! Today I was labbing something similar to this and I found you post. I know you created this topic about three years ago. Possibly you've resolved the issues in the mean time. Hopefully this message...
View ArticleRe: Question on storm control
https://computer.howstuffworks.com/lan-switch13.htm This may explain to you how a broadcast can be generated unintentionally and this will not happen on a converged STP topology. On a converged STP it...
View ArticleRSTP and BPDU Block-On-Edge
Hello colleagues, According to my understanding and reading about configuring rstp on Juniper interfaces: if bpdu-block-on-edge is configured:- When BPDU is received the port will be blocked.-It should...
View ArticleQFX3500 Performance Question
Hello,i want to use 2x QFX3500 as virtual chassis as my core switching and i have following featurs :10-15gbps bps6m pps8-9 BGP Peers with no full tables,10k Routes in worst case40-50k mac address in...
View ArticleBetreff: Juniper QFX License Issue
Hi all, In the same mean regarding the QFX Licensing, is the "S-QFX5K-C1-A2-3" include all features of "S-QFX5K-C1-A1-3" ? I think so but I want confirmation please. Thx in advance,
View ArticleBetreff: Juniper QFX License Issue
Yes, A2 includes all features of A1 as shown on in figure 12 on the following link....
View ArticleBetreff: Juniper QFX License Issue
@F1ght3r: I need to correct you a bit. QFX5120-48Y can currently be purchased in two variances: "legacy" and "flex" with different list prices. QFX5120-48Y-AFO is the legacy SKUQFX5120-48Y-AFO2 is the...
View ArticleBetreff: Juniper QFX License Issue
One other point for Flex Licenses. Currently there are no upgrade SKUs for A1 to A2/P or A2 to P, so best to purchase the license level you might need for the future, day 1. Yes some compensation on...
View ArticleStacking EX4650 with EX4600-40F?
Hello, I was wondering if there is a way to stack an EX4650 in a mixed virtual chassis with a EX4600-40F. I was reading this document where EX4650 is group with QFX. Thank you....
View ArticleRe: Stacking EX4650 with EX4600-40F?
Hi loba-ucb, Please be advised that EX4650 can't be stacked with other platforms, as you can see...
View ArticleJunos CoS Classification
I am reviewing the JNCIE-ENT self study bundle and am confused by some CoS configuration. The examples given guide the user through creating both dscp and ieee802.1p classifiers. Then they are...
View ArticleRe: DHCP option 82 relay: QFX switch does not insert client´s MAC address
Just asking.. The qfx acting the layer 3 "helper" for the devices connected to your system do you have a vlan option option 82 setup for it ?I only ask as I have had things not work the way I expected...
View ArticleRe: Junos CoS Classification
Hello, wrote:The guide then goes on to apply the ieee802.1p classifiers to several access and trunk interfaces (so as instructed, all L2 iterfaces). But an access interface will receive only untagged...
View ArticleRe: QFX3500 Performance Question
Hi blackmetal, QFX3500 in a VC should be able to handle that seemlessly. you can refer the the below doc for scaling limits of QFX3500 and your requirement falls well within the range of that....
View ArticleRe: Junos CoS Classification
Hi @aarseniev, many thanks for the detailed reply, it has cleared up a lot for me. One final question you may be able to help with. Why is the default classifier on an access interface a ieee802.1p...
View ArticleRe: Junos CoS Classification
Hello, wrote:. Why is the default classifier on an access interface a ieee802.1p classifier (ieee 802.1untrust)? I don't see this happening (meaning default classifier is not present on L2 interfaces)...
View ArticleRe: QFX5120-48Y VC-port with different speed
Hello.Do you have found any solution to this issue? We have an issue with aggregated links on a chassis (seems traffic crossing a member to another one are dropped), and we suspect the cause is this...
View ArticleSymetrical port mirroring
Say I wanted to tap my inet port for a firewall poc... will analyzer work for this, or do I need to use firewall filters?
View ArticleRe: Symetrical port mirroring
Hello rfb, Analyzer mirrors only bridged traffic. For mirroring routed traffic, use the port mirroring configuration with family as inet or inet6 Port mirror configuration is needed with the output...
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why does my qfx3500 fan fail every 1-2month ?
Hello,I have a 2x QFX3500 in virtual chassis mode and every 1-2 month one of my Fan trays showed as failed and everything is ok , Fan trays are spining at normal speed they have 1unit free space from...
View Articleqfx3500 false fan report
Hello,we have 2x qfx3500 in VC and since last week it shows chassis #1 fan tray 2 (management fan) is Failed then today we replaced it with a healthy management module but it still showing it as...
View ArticleRe: qfx3500 false fan report
Hi, if the fan continues to spin at normal rate then it could be a false alarm and you can ignore it. You can try to reboot the box once and see if the alarm goes away. you can also check out the below...
View ArticleRe: why does my qfx3500 fan fail every 1-2month ?
Hi, if it is happening again and again you better get the FPC0 replaced. Regards, Amit Rai
View ArticleRe: why does my qfx3500 fan fail every 1-2month ?
Hello,last month i replaced whole of the VC member with new qfx3500 but it seems its related something tot eh software.i have read in juniper kb that qfx5100 has same issue when the fan working outside...
View ArticleRe: QFX5120-48Y VC-port with different speed
The main problem has probably been that virtual chassis isn't supported on QFX5120-48Y before Junos 19.3R1. Using 18.4 with VC would have given strange issues like the one described. Ref....
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Re: Junos CoS Classification
Sorry for the delayed response. all requested detail is below. Code is 18.4, but I don't think anything is wrong. According to junos documentation it is expected behaviour. It just doesn't make sense...
View ArticleRe: Junos CoS Classification
Hi @aarsenievAlso would you know what happens when multiple BA classifiers are applied to the same interface. Which one would take priority in the case of both dscp/ieee802.1p being applied to a trunk...
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