I'd like to implement 802.1q tunneling in my network for a subsidiary which needs to connect two sites trough our network. In order to achieve it, I have to modify the mtu size to 1504 on all switches in my network. Has anybody some experience on it ? Is there well-known problems associated with this change ?
For me, only the traffic initiated to or by the switch could have some trouble but not with servers...
Tanks for your info but in the following document "http://www.cisco.com/en/US/customer/products/hw/switches/ps646/products_configuration_guide_chapter09186a0080115937.html" they mention "The default system MTU for traffic on the Catalyst 3550 switch is 1500 bytes. You can configure the switch to support frames larger than 1500 bytes by using the system mtu global configuration command. Because the 802.1Q tunneling feature increases the frame size by 4 bytes when the metro tag is added, you must configure all switches in the service-provider network to be able to process maximum frames by increasing the switch system MTU size to at least 1504 bytes. The maximum allowable system MTU for Catalyst 3550 Gigabit Ethernet switches is 2000 bytes; the maximum system MTU for Fast Ethernet switches is 1546 bytes" Could you explain their statement ?
We have a 10 MB L2 Metro pipe and send multiple tags across it. The provider uses Cisco gear and I had them to bump up the MTU in order to support this. They are running CatOS, but I believe this is possible in IOS natively with QinQ support or Baby Giants.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.