User`s guide

XSR User’s Guide 75
Chapter 5 General IP Features
Configuring IP
 The XSR supports 11 IP addresses per VR (1 primary + 10 secondary)
 With four VR's allowed per XSR, you can configure up to 44 virtual IP
addresses per XSR.
PPPoE & Secondary IP
Secondary IP is not supported on PPPoE interfaces.
Maximum Transmission Unit (MTU)
MTU is the largest frame size allowed on an interface. It is dictated by the link
level limit on a particular port. Examples of link layer types are Ethernet
encapsulation and 802.3 encapsulation. MTU limits the bytes of data that can
be sent in an IP packet using the
ip mtu command. Datagrams exceeding the
link layer's MTU must be fragmented. The default MTU size is 1500 bytes.
Refer to the XSR CLI Reference Guide for more information.
Ping
Ping is an important debugging tool for testing network layer connectivity
between a source and destination address. The source represents an IP
address on the XSR where the command is executed from. The destination
can be any IP address on the network, including an address on the same
device where a ping occurs.
The
ping command also allows the packet size to be specified.
Refer to the XSR CLI Reference Guide for more information.
Traceroute
Traceroute is a vital debugging tool which reports the route IP datagrams
follow to a certain destination. Its output is a complete list of routers that a
specific datagram crosses to reach its destination, as well as the round time
trip between the XSR where the Traceroute program runs and each of these
routers. The
traceroute command can be issued by the XSR.
Refer to the XSR CLI Reference Guide for more information.