Nick Reilly
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Re: How to disable neighbor discovery
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Nick Reilly
08/02/2018 10:16 AM
post119034
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Re: How to disable neighbor discovery
# ifconfig vt0
vt0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
capabilities rx=1f<IP4CSUM,TCP4CSUM,UDP4CSUM,TCP6CSUM,UDP6CSUM>
capabilities tx=7e<TCP4CSUM,UDP4CSUM,TCP6CSUM,UDP6CSUM,TSO4,TSO6>
enabled rx=1f<IP4CSUM,TCP4CSUM,UDP4CSUM,TCP6CSUM,UDP6CSUM>
enabled tx=0
address: 52:54:00:20:64:23
media: Ethernet autoselect
status: active
inet 192.168.122.102 netmask 0xffffff00 broadcast 192.168.122.255
inet6 fe80::5054:ff:fe20:6423%vt0 prefixlen 64 scopeid 0x11
inet6 2001::1 prefixlen 64
# ndp -na
Neighbor Linklayer Address Netif Expire S Flags
2001::1 52:54:00:20:64:23 vt0 permanent R
fe80::1%lo0 (incomplete) lo0 permanent R
fe80::5054:ff:fe20:6423%vt0 52:54:00:20:64:23 vt0 permanent R
# ndp -sn 2001::2 00:01:02:03:04:05
# ndp -na
Neighbor Linklayer Address Netif Expire S Flags
2001::1 52:54:00:20:64:23 vt0 permanent R
2001::2 00:01:02:03:04:05 vt0 permanent R
fe80::1%lo0 (incomplete) lo0 permanent R
fe80::5054:ff:fe20:6423%vt0 52:54:00:20:64:23 vt0 permanent R
# tcpdump -enlpi vt0 &
[1] 344075
# tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vt0, link-type EN10MB (Ethernet), capture size 262144 bytes
ping6 -nc3 2001::2
PING6(56=40+8+8 bytes) 2001::1 --> 2001::2
09:59:10.090490 52:54:00:20:64:23 > 00:01:02:03:04:05, ethertype IPv6 (0x86dd), length 70: 2001::1 > 2001::2: ICMP6,
echo request, seq 0, length 16
09:59:11.090614 52:54:00:20:64:23 > 00:01:02:03:04:05, ethertype IPv6 (0x86dd), length 70: 2001::1 > 2001::2: ICMP6,
echo request, seq 1, length 16
09:59:12.091746 52:54:00:20:64:23 > 00:01:02:03:04:05, ethertype IPv6 (0x86dd), length 70: 2001::1 > 2001::2: ICMP6,
echo request, seq 2, length 16
--- 2001::2 ping6 statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss
# fg
tcpdump -enlpi vt0
3 packets captured
3 packets received by filter
0 packets dropped by kernel
#
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