About d_sergienko

d_sergienko · 11-08-2025

Hello,I got 2 boxes of Cisco TelePresence MCU 5320 with a stacking cable. The cluster of them is not being formed due to the firmware version mismatch: 4.4(3.57) is the master, 4.5(1.75) is the slave.As these devices reached EoL many years ago, I can...

d_sergienko · 08-16-2025

Hello,I'm trying to setup a pretty simple solution for web servers load balancing using ITD on Nexus 93108TC-EX with NX-OS 10.3(6)M.There is a Deployment guide for Direct Server Response (ITD Service), and I'm following it with 3 exceptions:Ingress ...

d_sergienko · 07-28-2025

Hi all,One of the two ISR4431 started to boot into errors after power outage. I can enter ROMMON, able to boot many different IOSes (including external TFTP download via Gi0 interface), but all of them got stuck & reboot with the messages below (more...

d_sergienko · 08-28-2022

Hi all,I have old 7911 phone which randomly stops loading firmware via TFTP.The process begins as expected, phone loads term11.default.loads, then jar11sip.8-2-0-55.sbn, cnu11.8-2-0-55.sbn, apps11.8-2-0-55.sbn and no more.It may stop loading file par...

d_sergienko · 11-08-2025

Sure, migrating to CMS is obvious. But the question is to use existing hardware and licenses.Thanks for your input.

d_sergienko · 08-18-2025

Hi all,I've solved the problem myself. Now it works in DSR mode with the same VLAN for ingress and servers network with `advertising enable`. The root cause was vPC: it is critical to duplicate configuration on both vPC members, otherwise traffic may...

d_sergienko · 08-16-2025

Thanks for the prompt reply.If I follow your advice, I have a risk of traffic blocking on FirePower level as the single TCP/UDP/... connection spans across multiple interfaces: one is used for outgoing packets, another one is used for return from the...

d_sergienko · 07-30-2025

Dear all,Thanks @Leo Laohoo, M02@rt37 and @MHM Cisco World for your advices.At this point I can affirm the problem is 100% hardware related. We found a way to revive the box: disassemble the router, pull out motherboard, connect power supply, fans an...

d_sergienko · 07-30-2025

@Leo Laohoo wrote:Please post the complete output to the following commands: dir bootflash:core dir bootflash:tracelogsCould not do this on a live system, so switched eMMC bootflash onto working box and booted there.bootflash:core :30-Jul-25 12:06 ...

Member Since	‎11-19-2006 11:52 AM
Date Last Visited	‎11-08-2025 07:50 AM
Posts	22
Total Helpful Votes Received	8

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MCU 5300 firmware

ITD for servers LB on the same vlan

ISR4431 reboot loop with %CPPHA-3-INITFAIL (0x43)

IP Phone 7911 tftp partial firmware load

Re: MCU 5300 firmware

Re: ITD for servers LB on the same vlan

Re: ITD for servers LB on the same vlan

Re: ISR4431 reboot loop with %CPPHA-3-INITFAIL (0x43)

Re: ISR4431 reboot loop with %CPPHA-3-INITFAIL (0x43)