vrf configuration with same addresses

4 Nov 2018

      Hi All,

Tried to configure vrf with same own and peer addresses as in global.
When I ping in vrf,  packets go in and out via correct interfaces,
but bird bgp sessions are constantly flapping. Only one session to peer
with same address exists at each moment
As a w/a tried to configure interface per session, but this did not helped.

Here is my partial configuration:

protocol device {
  scan time 2;    # Scan interfaces every 2 seconds
}
protocol direct {
        interface "br*";                # bridge interfaces
        interface "swp*";       # router ports
        interface "bond*";              # Disable by default
        ipv4;                   # Connect to default IPv4 table
        ipv6;                   # ... and to default IPv6 table
}

protocol kernel {
        ipv4 {                  # Connect protocol to IPv4 table by channel
              table master4;    # Default IPv4 table is master4
              import none;      # Import to table, default is import all
              export all;       # Export to protocol. default is export none
        };
        learn on;                       # Learn alien routes from the kernel
        merge paths yes;
}

protocol bgp bgp3411 {
        local as 65001;
        bfd yes;
        neighbor 191.34.1.3 as 65034;
#        interface "swp2";
        ipv4 {
                import all;
                export all;
        };
}

protocol bgp bgp3412 {
        local as 65001;
        bfd yes;
        neighbor 192.34.1.3 as 65034;
#        interface "swp1";
        ipv4 {
                import all;
                export all;
        };
}

ipv4 table table_vrf01;

protocol kernel kernel_vrf01 {
        vrf "vrf01";
        kernel table 101;
        scan time 2;
        ipv4 {
                table table_vrf01;
                import none;    # Default is import all
                export all;     # Default is export none
        };
        merge paths yes;
        learn on;               # Learn all alien routes from the kernel
}

protocol direct direct_vrf01 {
        vrf "vrf01";
        ipv4 { table table_vrf01; };
        interface  "swp7.101";
        interface  "swp1.201";
        interface  "swp2.301";
        interface  "vrf01";
}

protocol static static_vrf01 {
        vrf "vrf01";
        ipv4 { table table_vrf01; };
}

protocol bgp bgp_vrf01_n1 {
        vrf "vrf01";
        local as 65001;
        graceful restart;
        neighbor 191.34.1.3 as 65034;
        ipv4 {
                table table_vrf01;
                import none;
                export none;
        };
}

protocol bgp bgp_vrf01_n2 {
        vrf "vrf01";
        local as 65001;
        graceful restart;
        neighbor 192.34.1.3 as 65034;
        ipv4 {
                table table_vrf01;
                import none;
                export none;
        };
}

ip -br link show type vrf
vrf01            UP             fe:58:94:d2:d8:ee
<NOARP,MASTER,UP,LOWER_UP>
vrf02            UP             42:2d:8f:bd:87:9f
<NOARP,MASTER,UP,LOWER_UP>
(mlnx)root@bdg-crf-01:~# ip route show vrf vrf01
172.1.7.0/24 dev swp7.101 proto kernel scope link src 172.1.7.1 offload
191.34.1.2/31 dev swp2.301 proto kernel scope link src 191.34.1.2 offload
192.34.1.2/31 dev swp1.201 proto kernel scope link src 192.34.1.2 offload
(mlnx)root@bdg-crf-01:~# ip route show table 101
broadcast 172.1.7.0 dev swp7.101 proto kernel scope link src 172.1.7.1
172.1.7.0/24 dev swp7.101 proto kernel scope link src 172.1.7.1 offload
local 172.1.7.1 dev swp7.101 proto kernel scope host src 172.1.7.1
broadcast 172.1.7.255 dev swp7.101 proto kernel scope link src 172.1.7.1
local 191.34.1.2 dev swp2.301 proto kernel scope host src 191.34.1.2
191.34.1.2/31 dev swp2.301 proto kernel scope link src 191.34.1.2 offload
local 192.34.1.2 dev swp1.201 proto kernel scope host src 192.34.1.2
192.34.1.2/31 dev swp1.201 proto kernel scope link src 192.34.1.2 offload

--
Semion Lisyansky