Anyone doing VLANs over B.A.T.M.A.N on 802.11s mesh? I can't see to get some traffic (e.g. DHCP) to flow. In a basic setup with a gateway and a dumb AP and a DHCP example, I see the full DHCP sequence (discover, offer, request, ack) on the gateway. On the dumb AP, I see the whole sequence up to the bat0 interface, but once that traffic hits the WLAN interface I never see that ACK.
I tested this with the 301w as the gateway and a Redmi AX6000 as a dumb AP, then made an identical config with just two Redmi AX6000s and it worked fine there. Assigning a static IP works. Can't for the life of me get DHCP to function.
More details:
301W: Gateway
AX6000: Dumb AP
802.11s on both, peer forwarding disabled. batctl shows neighbors are reachable, putting an IP works fine and I can ICMP fine.
Both devices have one bridge br with 5 VLAN tags. bat0 is added as a member to br and all 5 VLANs are tagged. Here's some TCP dumps.
Gateway (301w) on br.2 (IOT VLAN)
00:33:02.167779 xx:xx:xx:xx:xx:xx > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 255, id 35097, 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 from xx:xx:xx:xx:xx:xx, length 300, xid 0x61f4edfd, Flags [none] (0x0000)
Client-Ethernet-Address xx:xx:xx:xx:xx:xx
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Parameter-Request (55), length 9:
Subnet-Mask (1), Classless-Static-Route (121), Default-Gateway (3), Domain-Name-Server (6)
Domain-Name (15), Unknown (108), URL (114), Unknown (119)
Unknown (252)
MSZ (57), length 2: 1500
Client-ID (61), length 7: ether xx:xx:xx:xx:xx:xx
Lease-Time (51), length 4: 7776000
00:33:02.168865 yy:yy:yy:yy:yy:yy > xx:xx:xx:xx:xx:xx, ethertype IPv4 (0x0800), length 343: (tos 0xc0, ttl 64, id 42425, offset 0, flags [none], proto UDP (17), length 329)
10.0.2.1.67 > 10.0.2.16.68: [bad udp cksum 0x1957 -> 0xae74!] BOOTP/DHCP, Reply, length 301, xid 0x61f4edfd, Flags [none] (0x0000)
Your-IP 10.0.2.16
Server-IP 10.0.2.1
Client-Ethernet-Address xx:xx:xx:xx:xx:xx
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Offer
Server-ID (54), length 4: 10.0.2.1
Lease-Time (51), length 4: 43200
RN (58), length 4: 21600
RB (59), length 4: 37800
Subnet-Mask (1), length 4: 255.255.255.0
BR (28), length 4: 10.0.2.255
Default-Gateway (3), length 4: 10.0.2.1
Domain-Name (15), length 3: "lan"
Domain-Name-Server (6), length 8: 10.0.0.102,10.0.0.163
00:33:03.180637 xx:xx:xx:xx:xx:xx > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 255, id 35098, 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 from xx:xx:xx:xx:xx:xx, length 300, xid 0x61f4edfd, secs 1, Flags [none] (0x0000)
Client-Ethernet-Address xx:xx:xx:xx:xx:xx
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Parameter-Request (55), length 9:
Subnet-Mask (1), Classless-Static-Route (121), Default-Gateway (3), Domain-Name-Server (6)
Domain-Name (15), Unknown (108), URL (114), Unknown (119)
Unknown (252)
MSZ (57), length 2: 1500
Client-ID (61), length 7: ether xx:xx:xx:xx:xx:xx
Requested-IP (50), length 4: 10.0.2.16
Server-ID (54), length 4: 10.0.2.1
00:33:03.182329 yy:yy:yy:yy:yy:yy > xx:xx:xx:xx:xx:xx, ethertype IPv4 (0x0800), length 343: (tos 0xc0, ttl 64, id 42429, offset 0, flags [none], proto UDP (17), length 329)
10.0.2.1.67 > 10.0.2.16.68: [bad udp cksum 0x1957 -> 0xab73!] BOOTP/DHCP, Reply, length 301, xid 0x61f4edfd, secs 1, Flags [none] (0x0000)
Your-IP 10.0.2.16
Server-IP 10.0.2.1
Client-Ethernet-Address xx:xx:xx:xx:xx:xx
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: ACK
Server-ID (54), length 4: 10.0.2.1
Lease-Time (51), length 4: 43200
RN (58), length 4: 21600
RB (59), length 4: 37800
Subnet-Mask (1), length 4: 255.255.255.0
BR (28), length 4: 10.0.2.255
Default-Gateway (3), length 4: 10.0.2.1
Domain-Name (15), length 3: "lan"
Domain-Name-Server (6), length 8: 10.0.0.102,10.0.0.163
DHCP ACK never makes it to br.2 on the AX6000/dumb AP. bad udp cksum 0x1957 -> 0xab73! looks like it might be the culprit. Related? [solved] DHCP on VLAN interfaces - #5 by oofnik iptables aren't used any more, might have to dig in.
Anyone have ideas/suggestions?