Talat,
I was able to set the Broadcast flag in a DHCP negotiation when using IB
interface.
Trusty patch is possibly ready.
TCPDUMP from the OFFER and ACK:
$ sudo tcpdump -i ib0 -nn -vvv -S
tcpdump: listening on ib0, link-type LINUX_SLL (Linux cooked), capture size
65535 bytes
04:38:01.051682 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request, length
300, htype 32, hlen 0, xid 0xb48b8735, Flags [Broadcast] (0x8000)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Hostname Option 12, length 5: "dixie"
Parameter-Request Option 55, length 13:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP
Client-ID Option 61, length 17: hardware-type 56,
30:3a:30:30:3a:30:30:3a:34:38:3a:46:45:3a:38:30
END Option 255, length 0
PAD Option 0, length 0, occurs 15
04:38:01.051936 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
172.16.0.1.67 > 255.255.255.255.68: [udp sum ok] BOOTP/DHCP, Reply, length
300, htype 32, hlen 0, xid 0xb48b8735, Flags [Broadcast] (0x8000)
Your-IP 172.16.0.19
Server-IP 172.16.0.1
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Server-ID Option 54, length 4: 172.16.0.1
Lease-Time Option 51, length 4: 600
Subnet-Mask Option 1, length 4: 255.255.255.0
BR Option 28, length 4: 172.16.0.255
Domain-Name Option 15, length 7: "myib.cu"
END Option 255, length 0
PAD Option 0, length 0, occurs 23
04:38:01.052215 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request, length
300, htype 32, hlen 0, xid 0xb48b8735, Flags [Broadcast] (0x8000)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Server-ID Option 54, length 4: 172.16.0.1
Requested-IP Option 50, length 4: 172.16.0.19
Hostname Option 12, length 5: "dixie"
Parameter-Request Option 55, length 13:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP
Client-ID Option 61, length 17: hardware-type 56,
30:3a:30:30:3a:30:30:3a:34:38:3a:46:45:3a:38:30
END Option 255, length 0
PAD Option 0, length 0, occurs 3
04:38:01.052342 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
172.16.0.1.67 > 255.255.255.255.68: [udp sum ok] BOOTP/DHCP, Reply, length
300, htype 32, hlen 0, xid 0xb48b8735, Flags [Broadcast] (0x8000)
Your-IP 172.16.0.19
Server-IP 172.16.0.1
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: 172.16.0.1
Lease-Time Option 51, length 4: 600
Subnet-Mask Option 1, length 4: 255.255.255.0
BR Option 28, length 4: 172.16.0.255
Domain-Name Option 15, length 7: "myib.cu"
END Option 255, length 0
PAD Option 0, length 0, occurs 23
I'll review this tomorrow and release the PPA for you to test.
I have also to review isc-dhcp IB support for Vivid/Wily/Xenial.
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https://bugs.launchpad.net/bugs/1529815
Title:
InfiniBand DHCP flow with PRA and DHCP relay not working
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