I have the following issue on Solaris 11 Express.
I have a 1 running zone named Zone1, that I want to add a new interface to.
I bring up the interface bnx1:
ifconfig bnx1 plumb
Assign the address to the interface and bind it to the zone:
ifconfig bnx1 addif 172.16.13.11/16 zone Zone1 up
Check the ifconfig output:
bnx1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 5
inet 0.0.0.0 netmask ffffffff
ether 84:2b:2b:76:a1:88
bnx1:1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 5
zone Zone1
inet 172.16.13.11 netmask ffff0000 broadcast 172.16.255.255
Check the ARP table:
# arp -a
Net to Media Table: IPv4
Device IP Address Mask Flags Phys Addr
------ -------------------- --------------- -------- ---------------
bnx1 172.16.13.11 255.255.255.255 SPLA 84:2b:2b:76:a1:88
bnx0 172.16.13.10 255.255.255.255 SPLA 84:2b:2b:76:a1:86
At this point I have no ping the address:
ping 172.16.13.11
no answer from 172.16.13.11
Than I unplumb the Zone1 interface:
ifconfig bnx1:1 unplumb
Creating the logical interface w/o binding to the Zone1:
ifconfig bnx1 addif 172.16.13.11/16 up
Check the ifconfig output:
bnx1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 5
inet 0.0.0.0 netmask ffffffff
ether 84:2b:2b:76:a1:88
bnx1:1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 5
inet 172.16.13.11 netmask ffff0000 broadcast 172.16.255.255
Check the ARP table:
# arp -a
Net to Media Table: IPv4
Device IP Address Mask Flags Phys Addr
------ -------------------- --------------- -------- ---------------
bnx1 172.16.13.11 255.255.255.255 SPLA 84:2b:2b:76:a1:88
bnx0 172.16.13.10 255.255.255.255 SPLA 84:2b:2b:76:a1:86
And now I do have a ping:
# ping 172.16.13.11
172.16.13.11 is alive
Can you tell me what did I miss ?
Thanks !
Best Answer
My guess is that in the first case, the network stack is sending a ping out on bnx0 and not receiving a reply because bnx1 is not connected to the same network. In the second case, the ping is short-circuited through the network stack so it succeeds immediately.
In general I would not recommend using multiple interfaces on the same subnet in this way. If you need redundancy, use LACP (if your switch supports it) or IPMP. If you need traffic isolation, use a different subnet for bmz1. If you need neither, just add a new virtual interface to bmz0 instead of bmz1.