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radvd-project / radvd

radvd | Official repository: https://github.com/radvd-project/radvd
https://radvd.litech.org/
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Issue when radvd advertises the routes #191

Closed dpounraj closed 2 years ago

dpounraj commented 2 years ago

I have radvd running on my device which has MIPS arch. versions : kernel 3.4.11-rt19 , radvd 1.8.5.

radvd is advertising /64 network to LAN clients.

The device also has to accept RA (IP address and default route) in routing mode on WAN side. So, updated flags as below /proc/sys/net/ipv6/conf/bdg1/accept_ra = 2 /proc/sys/net/ipv6/conf/bdg1/autoconf = 1

We make use of bdg interfaces by binding physical ports to it. Here bdg2 is bind with physical LAN port eth3 and eth3.0 bdg1 is bind with eth0.X (X = VLAN number) All IPs are assigned to bdg interfaces.

Issue: When radvd advertises the routes in interface bdg2, it is received/accepted by bdg1 and a stateless IPv6 address is added to the interface as below.

Question : 1) Can we restrict learning of routes advertised by one interface to another interface of the same device? 2) Is the config of radvd correct?

Find the radvd configurations below,

interface bdg2 { AdvSendAdvert on; AdvManagedFlag on; # bdg2-AdvManagedFlag-place-holder AdvOtherConfigFlag off; # bdg2-AdvOtherConfigFlag-place-holder prefix 2006:db8:110f:ee76::/64 { AdvOnLink on; AdvValidLifetime 2592000; AdvPreferredLifetime 604800; AdvAutonomous on; # bdg2-AdvAutonomous-place-holder }; RDNSS 2001::54 { }; # place holder 0

place holder 1

    # place holder 2
    # place holder 3

}; # bdg2-end-block

ip -6 route

2006:db8:110f:ee76::/64 dev bdg1 proto kernel metric 256 expires 2146765sec 2006:db8:110f:ee76::/64 dev bdg2 proto kernel metric 256 #

ifconfig bdg1

bdg1 Link encap:Ethernet HWaddr xx:xx:B0:FD:EE:77 inet addr:192.168.49.1 Bcast:192.168.29.255 Mask:255.255.255.0 inet6 addr: 2006:db8:110f:ee76:1277:b0ff:fefd:ee77/64 Scope:Global inet6 addr: fe80::1277:b0ff:fefd:ee77/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3966 errors:0 dropped:70 overruns:0 frame:0 TX packets:2286 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:264237 (258.0 KiB) TX bytes:575615 (562.1 KiB)

Note: We cannot update to the latest version of radvd due to some constraints.

stappersg commented 2 years ago

On Wed, Oct 05, 2022 at 03:16:24AM -0700, BlackHacker wrote:

I have radvd running on my device which has MIPS arch. versions : kernel 3.4.11-rt19 , radvd 1.8.5.

Seeing the 1.8.5 version number made me check https://github.com/radvd-project/radvd/tags

Then after about six pages further did https://github.com/radvd-project/radvd/tags?after=v1.9.6 tell me that v1.8.5 is from the year 2012.

stappersg commented 2 years ago

Note: We cannot update to the latest version of radvd due to some constraints.

Which means: There is no reason to keep this issue open.