Version 6.8 15 Mediant MSBR
Configuration Guide 3. ICMP
3 ICMP
Internet Control Message Protocol (ICMP) is one of the main protocols in the IP suite and
in general, is used by network equipment to obtain information or notify about data delivery
problems, for example, in case a specific service is unavailable or a specific network or
host is unreachable.
The most common and known usages of ICMP are the ping and traceroute
commands, using ICMP messages to test IP reachability to an IP address on the internet,
and to verify the IP “hops” a packet travels on its way to the destination, respectively.
The ICMP protocol “runs” over UDP and is defined in RFC 792.
3.1 ping
The ping tests IP reachability to a desired destination. If the destination is reachable, there
will be the same amount of echo requests and replies.
Command structure:
ping <IP address / host> options
where the options are:
repeat - amount of ICMP requests to send.
size - size of the of the ICMP packet in bytes.
source – source from where to send the packets
summarized - display summarized results (! - successful reply, .U - No reply, timeout
and Unreachable)
source [data voip]- interface to use as source address for the ICMP requests. Voip or
data interfaces can be used. “Source voip” – allows you to select the source interface
as name or as VLAN number. “Source data – allows you to select any interface as
source for ping. The pings are sent from this interface. “Source data source-address”
allows you to ping from IP of any address while the next hop calculated using the
routing table. “Source data vrf” allows you to ping from any configured VRF.
Typical output:
MSBR# ping 192.168.0.3
Reply from 192.168.0.3: time=1 ms
Reply from 192.168.0.3: time=1 ms
Reply from 192.168.0.3: time=1 ms
Reply from 192.168.0.3: time=1 ms
4 packets transmitted, 4 packets received
Round-trip min/avg/max = 1/1/1 ms
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