On EX4400 the router flag is not set causing communication issues.
On NA message we do not see router flag set causing IPV6 communication issues.
Ping for that IPV6 does not work.
Topology
External Network ------- EX4400 ----- CLIENT
on EX4400 we have EVPN configurred with IRB and IPV6 address. Client is just extension of the IRB subnet.
When we try to ping from External network the ping does not work.
It was observed that the router flag was not set on NA message captured.
{master:0}
user@EX4400> show ethernet-switching mac-ip-table
MAC IP flags (S - Static, D - Dynamic, L - Local , R - Remote, Lp - Local Proxy,
Rp - Remote Proxy, K - Kernel, RT - Dest Route, (N)AD - (Not) Advt to remote,
RE - Re-ARP/ND, RO - Router, OV - Override, Ur - Unresolved, B - Blocked,
RTS - Dest Route Skipped, RGw - Remote Gateway, GBP - Group Based Policy,
RTF - Dest Route Forced, SC - Static Config, P - Probe, NLC - No Local Config,
LD - Local Down)
Routing instance : L2_DAA_ACCESS_INSTANCE
Bridging domain : VLAN111_DAA_ACCESS
IP MAC Flags GBP Logical Active
address address Tag Interface source
172.19.105.6 00:00:5E:00:53:00 DL,K,RT,AD ge-0/0/9.0
2001:db8::xx11 00:00:5E:00:53:01 DL,K,RT,AD ge-0/0/10.0
fe80::f21c:2dff:feaa:c563 00:00:5E:00:53:01 DL,K,RT,AD ge-0/0/10.0
2001:db8::xxx1 00:00:5E:00:53:01 S,K irb.111
fe80::fac1:1600:6f50:5500 00:00:5E:00:53:01 S,K irb.111
Bridging domain : VLAN112_DAA_ACCESS
2001:db8::1:xx11 00:00:5E:00:53:02 S,K,NAD irb.112
fe80::fac1:1600:7050:5500 00:00:5E:00:53:02 S,K,NAD irb.112
user@EX4400>
The issue is fixed in later releases as shown below;
When EVPN (Ethernet Virtual Private Network) routing instance has IRB (Integrated Routing and Bridging) interface with IPv6 (Internet Protocol version 6) address, ICMPv6 NA (Neighbour advertisement) reply from IRB IPv6 address doesn't have router flag. The ICMPv6 NA from IRB IPv6 should have router flag.
evo:23.4R2-S4-EVO evo:23.4X100-D30-EVO evo:24.2R2-EVO evo:24.4R2-EVO evo:24.4R2-S1-EVO evo:25.1R1-EVO evo:25.2R1-EVO junos:23.4R2-S4 junos:24.2R2 junos:24.4R2 junos:24.4R2-S1 junos:25.1R1 junos:25.2R1