About SmirnovEug

SmirnovEug · 12-18-2015

Hi all! We run pretty developed network infrastructure with 100+ offices on all continents. Recently we have performed network hardware upgrade and installed 2 pairs of Cisco ASR1001 in two key offices separated by Atlantic ocean. We use GRE point-t...

SmirnovEug · 07-05-2014

Hello everybody!Could you please help me in the following: General problemThere is a router with NM-32A, which serves as a console server for a number of Cisco routers and switches. When some network diagram has been assembled using some of them, and...

SmirnovEug · 04-03-2019

Yes. The issue didn't relate to GRE tunnels performance - actually we moved to IPsec VTIs since then. The issue was mostly due long fat pipe between offices so we needed to tune TCP parameters to achieve a bit better throughput. But still some teams ...

SmirnovEug · 12-23-2015

Hi, Josef! Thank you for reply! I have checked: 1) There is no fragmentation due to "ip tcp adjust-mss 1360" command issued in interface Tunnel configuration mode. 2) Following are tcp parameters after tuning on both sides: net.core.wmem_max = 16777...

SmirnovEug · 12-23-2015

Hi Saurabh! MTU ? - No, there is no fragmentation, I have double checked it Path Discovery ? - We don't need this because at TCP level two hosts agree on MSS that, after addition of IP header, produces MTU less or equal to IP MTU set on interface Tun...

Member Since	‎04-21-2008 03:25 AM
Date Last Visited	‎08-05-2020 12:02 AM
Posts	5

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Low performance of GRE tunnels without encryption on ASR1001

Remote execution of Cisco IOS commands through console server in Tcl script

Re: Hi, Josef!

Hi, Josef!

Hi Saurabh!