IP Router Configuration
7705 SAR OS Router Configuration Guide 37
The 7705 SAR supports the ICMPv6 capabilities described in Table 4.
Destination unreachable Generated by a router to inform the source host that
the destination is unreachable for a specified reason
Echo request/Echo reply Used by the ping utility to test whether a host is
reachable across an IP network and to measure the
roundtrip time for packets sent from the local host
to a destination node
Table 4: ICMPv6 Capabilities for IPv6
ICMPv6 Message Description
Destination unreachable Generated by a router to inform the source host that
the destination is unreachable for a specified
reason, other than congestion
Packet too big Generated by a router in response to a packet that it
cannot forward because the packet is larger than the
MTU of the outgoing link.
Time exceeded Generated by a router to inform the source of a
packet that was discarded because the hop limit
was exceeded in transit
Parameter problem Generated by a router to inform the source of a
packet that the packet was discarded due to a
problem with a field in the IPv6 header or
extension header that prevented it from processing
the packet
Echo request/Echo reply Used by the ping utility to test whether a host is
reachable across an IP network and to measure the
roundtrip time for packets sent from the local host
to a destination node
Neighbor Discovery ICMPv6 Messages
Router solicitation Sent by a host, when an interface is enabled, to
request routers to generate router advertisements
immediately rather than at their next scheduled
time
Table 3: ICMP Capabilities for IPv4 (Continued)
ICMP Message Description
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