I have a 1751 Router (Version 12.1(5)YB4) connected to a 2970 Switch (Version 12.2(25)SEB2), when I create a sub-inter face on the Router it accumulates errors (10% approx), the interfaces were configured with fixed speed and duplex settings and to trunk (dot1q), when I stripped back the sub-interface from the router and made the switch interface switchport access it works fine. This is not ideal as I do require the interfaces to be set to switchport mode trunk. Any ideas?
It seems as if you do not understand the point. There are two ways to transport packets between vlan capable devices. The most well known method is by using dot1Q encapsulation, the vlan-tag contains the vlan id. For compatability reasons the standard also involves the possible use of untagged traffic. This is done over the native vlan.
Problems can arise when one side is expecting untagged traffic but receives the traffic with a tag or vice versa. On switches, you can configure this by setting the native vlan on a port. On routers this is also the case, you are configuring the vlan id on the sub-if. The native vlan can be configured on the physical interface in which case it's traffic is not tagged. By not configuring this, you are tagging all vlans. On switches, you must configure the native vlan to be tagged if you want this. The default is: vlan 1 = native = untagged
Both sides must be set identical, no data can be exchanged otherwise.
since you say that Exchange traffic is affected, there might be a problem with the MTU or MSS settings. Try and configure the following on your LAN (sub)interfaces and check if that makes a difference:
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.