3Com S7906E Command Reference Manual page 2270

Description
Use the tos command to configure the value of the ToS field in the IP header in an NQA probe packet.
Use the undo tos command to restore the default.
By default, the ToS field in the IP header of an NQA probe packet is 0.
Examples
# Configure the ToS field in a IP packet header in an NQA probe packet as 1.
<Sysname> system-view
[Sysname] nqa entry admin test
[Sysname-nqa-admin-test] type icmp-echo
[Sysname-nqa-admin-test-icmp-echo] tos 1
ttl
Syntax
ttl value
undo ttl
View
DLSw, FTP, HTTP, ICMP-echo, SNMP, TCP, UDP-echo, UDP-jitter test type view
Default Level
2: System level
Parameters
value: Maximum number of hops a probe packet traverses in the network, in the range 1 to 255.
Description
Use the ttl command to configure the maximum number of hops a probe packet traverses in the
network.
Use the undo ttl command to restore the default.
By default, the maximum number of hops that a probe packet can traverse in a network is 20.
Note that after you configure the route-option bypass-route command, the maximum number of hops
a probe packet traverses in the network is 1, and the ttl command does not take effect.
Examples
# Configure the maximum number of hops that a probe request can traverse in a network as 16.
<Sysname> system-view
[Sysname] nqa entry admin test
[Sysname-nqa-admin-test] type icmp-echo
[Sysname-nqa-admin-test-icmp-echo] ttl 16
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