About joechankc2013

joechankc2013 · 05-24-2017

A single ASA5520 (FW) connecting to the Internet had configured with an EtherChannel to a switch stack (C2960S x2) in my site. The simplified network is shown in the diagram below. This network design had been setup for a few years without problem a...

joechankc2013 · 05-28-2017

Hi Jon Marshall, Sure. I think the redundant interface is another possible solution. The configuration for port-channel is extracted as follows. FW#show config ! errdisable recovery cause link-flaperrdisable recovery interval 60port-channel load-ba...

joechankc2013 · 05-27-2017

Hi willwetherman, You are correct that SW2 became the stack master when SW1 failed in the incident. The priorities of SW1 and SW2 had been set to 15 and 14 respectively after the replacement of SW1, however, SW2 remained as the stack master. There ...

joechankc2013 · 05-26-2017

Hi willwetherman, I learnt about the resilient fail-over test was successful from an old document. No saved configuration cannot be found before this incident. Here is the configuration after this incident. SW1#show switchSwitch/Stack Mac Address ...

joechankc2013 · 05-25-2017

Hi willwetherman, Thank you for your detailed explanation about the (LACP) System-ID. I would agree with your suggestion that configuring 'stack-mac persistent timer 0' would be a workaround, however, I have no idea about how to test this model as t...

joechankc2013 · 05-25-2017

Hi Reza Sharifi, Thank you for your reply. (1) In the Resilient Test, the master unit (SW1) of stacked switch C2960S has been powered off. NIC Teaming monitor shows that the network traffic is routed from the Server to the secondary unit (SW2) of ...

Member Since	‎05-24-2017 12:53 AM
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Is this a network design defect?

Hi Jon Marshall,

Hi willwetherman,

Hi willwetherman,

Hi willwetherman,

Hi Reza Sharifi,