!A 在 traceroute 中是什么意思？

Question

Store_85000#traceroute 4.2.2.2 source vlan 1
Type escape sequence to abort.
Tracing the route to b.resolvers.Level3.net (4.2.2.2)
VRF info: (vrf in name/id, vrf out name/id)
1 10.32.5.57 76 msec 68 msec 68 msec
2 10.32.5.57 !A  *  !A 
Store_85000#

Answer 1

!A 方法 Administratively prohibited

下面是一些常见的 traceroute 字符的列表：

*    The probe timed out
A    Administratively prohibited (example, access-list)
Q    Source quench (destination too busy)
I    User interrupted test
U    Port unreachable
H    Host unreachable
N    Network unreachable
P    Protocol Unreachable
T    Timeout
?    Unknown packet type

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