Cisco 3750X & VMware

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If you have to connect VMware server to a Cisco 3750X Stack via Port-Channel consider this: In Cisco, the default PVID is 1 In a Cisco trunk the PVID pass untagged VMware virtual switch tag VLAN 1 on a trunk Default channel-group is EtherChannel So if you pass many VLAN (id. 1 included) on a trunk interface this is the …

Routers diagnostics

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to make a complete deep diagnosis of your router one of the most complete tools is: Sometimes the generated file is asked by vendors when you open a Cisco TAC or a Huawei CASE. The output of these commands is very large so on Huawei you can add the filename option and export the file via TFTP, while for Cisco, …

Huawei – eBGP sensitive interface

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by default a BGP session do not shutdown until the Hold timer times out. In Huawei Keep-alive is 60s and Hold-time is 180s. So if we are in multi ISP environment and internet peer go down, the networks preferred by the failed peer are black-holed. With the command: ebgp-interface-sensitive The BGP router clear the peer session immediately if the interface …

BGP – Let’s read the Routing Table

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Routing table represent all the information the bgp protocol collect from his peers to build the IP Routing table. On these examples you can find small details that are useful for troubleshooting. Of course every time you type the display bgp routing-table command you have a little codes legend: But dig a little bit: Status codes are the very firsts …

Archive function Cisco 6500

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Little trick to automate save and export configs of your cores: time-period is how often the script, in minutes, is execute.write-mem command calls the archive script every time you save configs on the router. .glitchlist crew