No packet fragmentation or VPLS Control word bullshit nor frame drops nor MTU mismatch. Nothing breaks, because layer 3 MTU matches correctly between each termination 元, so PMTUD does it's job. My loopbacks are all 9k 元 MTU, most of my paths are 9k 元 MTU back-to-back, but some paths are 1500, some paths like wireless are 1500 on layer 3, but 1600 on layer 2 on the radios, but 9k L2 and 元 MTU on the transport ports on my PE router and P for example. Don't justify to yourself with this "1600" cap, do 9k MTU on the PHYs everywhere when possible to ensure future overhead room for anything. MTU itself is a piece of cake, however, when your network has all types of devices with varying MTUs, proper planning is required. MTU design and training, is often something I don't see very often in network training programmes and certs. 元 MTU should be 9k in the backbone on the physical ports, but you cap it wherever required on the layer 3 sub interface, such as LACP bonding to your upstream devices or the 元 VLAN interface towards another device etc PMTUD works correctly in ALL paths and directions (MPLS TE? LDP? OSPF? BGP? GRE? WireGuard? Bridge, VLAN, VPLS? Etc)Ģ. Layer 3 MTU needs to be designed in a way that it ensures:ġ. I mean, wireless paths, technically, can do 9k MTU for layer 2 if the vendor supports, like some units from Ubiquiti.īut the point is, layer 2 MTU should always be MAXED out on ALL Devices, even if it's different between them. Close the command prompt to complete this activity.Yes, it matters.If you see replies indicating success, you have Internet connectivity and IPv6 host name resolution. To test Internet connectivity with IPv6 host name resolution: is the IPv6-only host name of Google's web servers. If you see replies indicating success, you have IPv6 Internet connectivity.Īctivity 9 - Ping an Internet Host by IPv6 Name If you see replies indicating success, you have Internet connectivity and host name resolution.Īctivity 8 - Ping an Internet Host by IPv6 Address Ģ001:4860:4860::8888 is the IPv6 address of one of Google's public DNS servers. To test Internet connectivity with host name resolution: is the host name of one of Google's public DNS servers. If you see replies indicating success, you have Internet connectivity.Īctivity 7 - Ping an Internet Host by Name If you see replies indicating success, you have local network connectivity.Īctivity 6 - Ping an Internet Host by IPv4 Address Ĩ.8.8.8 is the IPv4 address of one of Google's public DNS servers. For example, if the default gateway address was 192.168.1.1, you would type ping 192.168.1.1. If you are unable to ping the local loopback adapter, TCP/IP might need to be reloaded or reconfigured on the machine you are using. 0.1, and pinging this address will always return a reply unless the firewall prevents it. Type ping where is the default gateway address displayed above. In a TCP/IP network, the loopback IP address is 127.0.Use ipconfig to display the default gateway address.Then press Enter.Īctivity 5 - Ping the Default Gateway For example, if the host name was host1, you would type ping host1. Type ping where is the Host Name IPv4 address displayed above.Use ipconfig /all to display the host name. Then press Enter.Īctivity 4 - Ping the Host Name Type ping where is the IPv4 address displayed above.Use ipconfig to display the host IP address.This is an alias for the loopback address:Īctivity 3 - Ping the Host IPv4 Address To test host name cache resolution, ping the name localhost. You should see replies indicating success.Īctivity 2 - Ping Localhost To test whether or not TCP/IP is functioning on the local host, first ping the loopback address 127.0.0.1: These activities will show you how to use the ping command to ping a host.Īctivity 1 - Ping Loopback Address The command to ping a host is ping, where is the host name or IP address of the host you want to ping.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |