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documentation:examples:ecmp [2019/10/30 14:45] – [Router 1 (client)] olivierdocumentation:examples:ecmp [2020/09/19 17:36] – [VM 2 (ECMP router)] olivier
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 ====== Equal-cost multi-path routing (ECMP) ====== ====== Equal-cost multi-path routing (ECMP) ======
  
-This lab show an ECMP (feature called RADIX_MPATH on FreeBSD) routing example using BSDRP (FreeBSD 11).+This lab is testing new ECMP routing code.
  
 ===== Presentation ===== ===== Presentation =====
Line 84: Line 84:
  
 <code> <code>
-sysrc hostname=R1 +sysrc hostname=VM1 \ 
-sysrc gateway_enable=NO + gateway_enable=NO \ 
-sysrc ipv6_gateway_enable=NO + ipv6_gateway_enable=NO \ 
-sysrc ifconfig_vtnet0="inet 10.0.12.1/24" + ifconfig_vtnet0="inet 10.0.12.1/24" \ 
-sysrc ifconfig_vtnet0_alias1="inet 10.0.12.11/32" + ifconfig_vtnet0_alias1="inet 10.0.12.11/32" \ 
-sysrc ifconfig_vtnet0_alias2="inet 10.0.12.21/32" + ifconfig_vtnet0_alias2="inet 10.0.12.21/32" \ 
-sysrc ifconfig_vtnet0_alias3="inet 10.0.12.31/32" + ifconfig_vtnet0_alias3="inet 10.0.12.31/32" \ 
-sysrc ifconfig_vtnet0_alias4="inet 10.0.12.41/32" + ifconfig_vtnet0_alias4="inet 10.0.12.41/32" \ 
-sysrc ifconfig_vtnet0_alias5="inet 10.0.12.51/32" + ifconfig_vtnet0_alias5="inet 10.0.12.51/32" \ 
-sysrc ifconfig_vtnet0_ipv6="inet6 2001:db8:12::1 prefixlen 64" + ifconfig_vtnet0_ipv6="inet6 2001:db8:12::1 prefixlen 64" \ 
-sysrc ifconfig_vtnet0_alias61="inet6 2001:db8:12::11 prefixlen 64" + ifconfig_vtnet0_alias61="inet6 2001:db8:12::11 prefixlen 64" \ 
-sysrc ifconfig_vtnet0_alias62="inet6 2001:db8:12::21 prefixlen 64" + ifconfig_vtnet0_alias62="inet6 2001:db8:12::21 prefixlen 64" \ 
-sysrc ifconfig_vtnet0_alias63="inet6 2001:db8:12::31 prefixlen 64" + ifconfig_vtnet0_alias63="inet6 2001:db8:12::31 prefixlen 64" \ 
-sysrc ifconfig_vtnet0_alias64="inet6 2001:db8:12::41 prefixlen 64" + ifconfig_vtnet0_alias64="inet6 2001:db8:12::41 prefixlen 64" \ 
-sysrc ifconfig_vtnet0_alias65="inet6 2001:db8:12::51 prefixlen 64" + ifconfig_vtnet0_alias65="inet6 2001:db8:12::51 prefixlen 64" \ 
-sysrc defaultrouter="10.0.12.2" + defaultrouter="10.0.12.2" \ 
-sysrc ipv6_defaultrouter="2001:db8:12::2"+ ipv6_defaultrouter="2001:db8:12::2"
 service hostname restart service hostname restart
 service netif restart service netif restart
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 </code> </code>
  
-==== Router 2 (ECMP router) ====+==== VM 2 (ECMP router) ====
  
-R2 is a router with ECMP: 2 static routes toward the same destination but using 2 different next-hop.+VM 2 is a router with ECMP: 2 static routes toward the same destination but using 2 different next-hop.
  
 <code> <code>
-sysrc hostname=R2 +sysrc hostname=VM2 \ 
-sysrc ifconfig_vtnet0="inet 10.0.12.2/24" + ifconfig_vtnet0="inet 10.0.12.2/24" \ 
-sysrc ifconfig_vtnet1="inet 10.0.23.2/24" + ifconfig_vtnet1="inet 10.0.23.2/24" \ 
-sysrc ifconfig_vtnet2="inet 10.0.24.2/24" + ifconfig_vtnet2="inet 10.0.24.2/24" \ 
-sysrc ifconfig_vtnet0_ipv6="inet6 2001:db8:12::2 prefixlen 64" + ifconfig_vtnet0_ipv6="inet6 2001:db8:12::2 prefixlen 64" \ 
-sysrc ifconfig_vtnet1_ipv6="inet6 2001:db8:23::2 prefixlen 64" + ifconfig_vtnet1_ipv6="inet6 2001:db8:23::2 prefixlen 64" \ 
-sysrc ifconfig_vtnet2_ipv6="inet6 2001:db8:24::2 prefixlen 64" + ifconfig_vtnet2_ipv6="inet6 2001:db8:24::2 prefixlen 64" \ 
-sysrc static_routes="R3R6 R3R5 R4R6 R4R5" + static_routes="VM3VM6 VM3VM5 VM4VM6 VM4VM5" \ 
-sysrc route_R3R6="-net 10.0.56.0/24 10.0.23.3" + route_VM3VM6="-net 10.0.56.0/24 10.0.23.3" \ 
-sysrc route_R3R5="-net 10.0.35.0/24 10.0.23.3" + route_VM3VM5="-net 10.0.35.0/24 10.0.23.3" \ 
-sysrc route_R4R6="-net 10.0.56.0/24 10.0.24.4" + route_VM4VM6="-net 10.0.56.0/24 10.0.24.4" \ 
-sysrc route_R4R5="-net 10.0.45.0/24 10.0.24.4" + route_VM4VM5="-net 10.0.45.0/24 10.0.24.4" \ 
-sysrc ipv6_static_routes="R3R6 R3R5 R4R6 R4R5" + ipv6_static_routes="VM3VM6 VM3VM5 VM4VM6 VM4VM5" \ 
-sysrc ipv6_route_R3R6="2001:db8:56:: -prefixlen 64 2001:db8:23::3" + ipv6_route_VM3VM6="2001:db8:56:: -prefixlen 64 2001:db8:23::3" \ 
-sysrc ipv6_route_R3R5="2001:db8:35:: -prefixlen 64 2001:db8:23::3" + ipv6_route_VM3VM5="2001:db8:35:: -prefixlen 64 2001:db8:23::3" \ 
-sysrc ipv6_route_R4R6="2001:db8:56:: -prefixlen 64 2001:db8:24::4" + ipv6_route_VM4VM6="2001:db8:56:: -prefixlen 64 2001:db8:24::4" \ 
-sysrc ipv6_route_R4R5="2001:db8:45:: -prefixlen 64 2001:db8:24::4"+ ipv6_route_VM4VM5="2001:db8:45:: -prefixlen 64 2001:db8:24::4"
 service hostname restart service hostname restart
 service netif restart service netif restart
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 </code> </code>
  
-==== Router 3 (simple router) ====+Checking static route with multiple next-hop:
  
-R3 is a simple router.+<code> 
 +[root@VM2]~# netstat -rn4 | grep 10.0.56.0 
 +10.0.56.0/24       10.0.24.4          UGS      vtnet2 
 +10.0.56.0/24       10.0.23.3          UGS      vtnet1 
 +[root@VM2]~# route -n get 10.0.56.0/24 
 +   route to: 10.0.56.0 
 +destination: 10.0.56.0 
 +       mask: 255.255.255.0 
 +    gateway: 10.0.24.4 
 +        fib: 0 
 +  interface: vtnet2 
 +      flags: <UP,GATEWAY,DONE,STATIC> 
 + recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire 
 +       0         0         0         0      1500       100         0 
 +[root@VM2]~# netstat -4onW 
 +Nexthop data 
 + 
 +Internet: 
 +Idx   Type         IFA                Gateway             Flags      Use Mtu         Netif     Addrif Refcnt Prepend 
 +4       v4/resolve 10.0.23.2          vtnet1/resolve                   0   1500     vtnet1               1 
 +6       v4/resolve 10.0.24.2          vtnet2/resolve                   0   1500     vtnet2               1 
 +2       v4/resolve 10.0.12.2          vtnet0/resolve                   3   1500     vtnet0               1 
 +1       v4/resolve 127.0.0.1          lo0/resolve        HS            6  16384        lo0               1 
 +7       v4/resolve 127.0.0.1          lo0/resolve        HS            0  16384        lo0    vtnet2     1 
 +5       v4/resolve 127.0.0.1          lo0/resolve        HS            0  16384        lo0    vtnet1     1 
 +3       v4/resolve 127.0.0.1          lo0/resolve        HS            0  16384        lo0    vtnet0     1 
 +9            v4/gw 10.0.24.2          10.0.24.4          GS            3   1500     vtnet2               2 
 +8            v4/gw 10.0.23.2          10.0.23.3          GS            0   1500     vtnet1               2 
 +Nexthop groups data 
 +BUF: 192 
 + 
 +Internet: 
 +MpIdx NHIdx Weigh Slots            Gateway Netif      Refcnt 
 +1      ---- ---- ----              ----      ----    1 
 +          9   100     1          10.0.24.4    vtnet2 
 +          8   100     1          10.0.23.3    vtnet1 
 +           
 +[root@VM2]~# route -n6 get 2001:db8:56::/64 
 +   route to: 2001:db8:56:: 
 +destination: 2001:db8:56:: 
 +       mask: ffff:ffff:ffff:ffff:: 
 +    gateway: 2001:db8:24::4 
 +        fib: 0 
 +  interface: vtnet2 
 +      flags: <UP,GATEWAY,DONE,STATIC> 
 + recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire 
 +       0         0         0         0      1500         0         0 
 +</code> 
 +==== VM 3 (router) ==== 
 + 
 +VM 3 is a simple router.
  
 <code> <code>
-sysrc hostname=R3 +sysrc hostname=VM3 \ 
-sysrc ifconfig_vtnet1="inet 10.0.23.3/24" + ifconfig_vtnet1="inet 10.0.23.3/24" \ 
-sysrc ifconfig_vtnet3="inet 10.0.35.3/24" + ifconfig_vtnet3="inet 10.0.35.3/24" \ 
-sysrc ifconfig_vtnet1_ipv6="inet6 2001:db8:23::3 prefixlen 64" + ifconfig_vtnet1_ipv6="inet6 2001:db8:23::3 prefixlen 64" \ 
-sysrc ifconfig_vtnet3_ipv6="inet6 2001:db8:35::3 prefixlen 64" + ifconfig_vtnet3_ipv6="inet6 2001:db8:35::3 prefixlen 64" \ 
-sysrc static_routes="R6 R1" + static_routes="VM6 VM1" \ 
-sysrc route_R1="-net 10.0.12.0/24 10.0.23.2" + route_VM1="-net 10.0.12.0/24 10.0.23.2" \ 
-sysrc route_R6="-net 10.0.56.0/24 10.0.35.5" + route_VM6="-net 10.0.56.0/24 10.0.35.5" \ 
-sysrc ipv6_static_routes="R6 R1" + ipv6_static_routes="VM6 VM1" \ 
-sysrc ipv6_route_R1="2001:db8:12:: -prefixlen 64 2001:db8:23::2" + ipv6_route_VM1="2001:db8:12:: -prefixlen 64 2001:db8:23::2" \ 
-sysrc ipv6_route_R6="2001:db8:56:: -prefixlen 64 2001:db8:35::5"+ ipv6_route_VM6="2001:db8:56:: -prefixlen 64 2001:db8:35::5"
 service hostname restart service hostname restart
 service netif restart service netif restart
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 </code> </code>
  
-==== Router 4 (simple router) ====+==== VM 4 (router) ====
  
-R4 is like R3, a simple router.+VM 4 is like VM 3, a simple router.
  
 <code> <code>
-sysrc hostname=R4 +sysrc hostname=VM4 \ 
-sysrc ifconfig_vtnet1="inet 10.0.24.4/24" + ifconfig_vtnet1="inet 10.0.24.4/24" \ 
-sysrc ifconfig_vtnet3="inet 10.0.45.4/24" + ifconfig_vtnet3="inet 10.0.45.4/24" \ 
-sysrc ifconfig_vtnet1_ipv6="inet6 2001:db8:24::4 prefixlen 64" + ifconfig_vtnet1_ipv6="inet6 2001:db8:24::4 prefixlen 64" \ 
-sysrc ifconfig_vtnet3_ipv6="inet6 2001:db8:45::4 prefixlen 64" + ifconfig_vtnet3_ipv6="inet6 2001:db8:45::4 prefixlen 64" \ 
-sysrc static_routes="R6 R1" + static_routes="VM6 VM1" \ 
-sysrc route_R1="-net 10.0.12.0/24 10.0.24.2" + route_VM1="-net 10.0.12.0/24 10.0.24.2" \ 
-sysrc route_R6="-net 10.0.56.0/24 10.0.45.5" + route_VM6="-net 10.0.56.0/24 10.0.45.5" \ 
-sysrc ipv6_static_routes="R6 R1" + ipv6_static_routes="VM6 VM1" \ 
-sysrc ipv6_route_R1="2001:db8:12:: -prefixlen 64 2001:db8:24::2" + ipv6_route_VM1="2001:db8:12:: -prefixlen 64 2001:db8:24::2" \ 
-sysrc ipv6_route_R6="2001:db8:56:: -prefixlen 64 2001:db8:45::5"+ ipv6_route_VM6="2001:db8:56:: -prefixlen 64 2001:db8:45::5"
 service hostname restart service hostname restart
 service netif restart service netif restart
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 </code> </code>
  
-==== Router 5 (ECMP router) ====+==== VM 5 (ECMP router) ====
  
-R5 is like R2, a router with ECMP: 2 static routing toward the same destination but using 2 different next-hop..+VM 5 is like VM 2, a router with ECMP: 2 static routing toward the same destination but using 2 different next-hop..
  
 <code> <code>
-sysrc hostname=R5 +sysrc hostname=VM5 \ 
-sysrc ifconfig_vtnet2="inet 10.0.35.5/24" + ifconfig_vtnet2="inet 10.0.35.5/24" \ 
-sysrc ifconfig_vtnet3="inet 10.0.45.5/24" + ifconfig_vtnet3="inet 10.0.45.5/24" \ 
-sysrc ifconfig_vtnet4="inet 10.0.56.5/24" + ifconfig_vtnet4="inet 10.0.56.5/24" \ 
-sysrc ifconfig_vtnet2_ipv6="inet6 2001:db8:35::5 prefixlen 64" + ifconfig_vtnet2_ipv6="inet6 2001:db8:35::5 prefixlen 64" \ 
-sysrc ifconfig_vtnet3_ipv6="inet6 2001:db8:45::5 prefixlen 64" + ifconfig_vtnet3_ipv6="inet6 2001:db8:45::5 prefixlen 64" \ 
-sysrc ifconfig_vtnet4_ipv6="inet6 2001:db8:56::5 prefixlen 64" + ifconfig_vtnet4_ipv6="inet6 2001:db8:56::5 prefixlen 64" \ 
-sysrc static_routes="R3R1 R3R2 R4R1 R4R2" + static_routes="VM3VM1 VM3VM2 VM4VM1 VM4VM2" \ 
-sysrc route_R3R1="-net 10.0.12.0/24 10.0.35.3" + route_VM3VM1="-net 10.0.12.0/24 10.0.35.3" \ 
-sysrc route_R3R2="-net 10.0.23.0/24 10.0.35.3" + route_VM3VM2="-net 10.0.23.0/24 10.0.35.3" \ 
-sysrc route_R4R1="-net 10.0.12.0/24 10.0.45.4" + route_VM4VM1="-net 10.0.12.0/24 10.0.45.4" \ 
-sysrc route_R4R2="-net 10.0.24.0/24 10.0.45.4" + route_VM4VM2="-net 10.0.24.0/24 10.0.45.4" \ 
-sysrc ipv6_static_routes="R3R1 R3R2 R4R1 R4R2" + ipv6_static_routes="VM3VM1 VM3VM2 VM4VM1 VM4VM2" \ 
-sysrc ipv6_route_R3R1="2001:db8:12:: -prefixlen 64 2001:db8:35::3" + ipv6_route_VM3VM1="2001:db8:12:: -prefixlen 64 2001:db8:35::3" \ 
-sysrc ipv6_route_R3R2="2001:db8:23:: -prefixlen 64 2001:db8:35::3" + ipv6_route_VM3VM2="2001:db8:23:: -prefixlen 64 2001:db8:35::3" \ 
-sysrc ipv6_route_R4R1="2001:db8:12:: -prefixlen 64 2001:db8:45::4" + ipv6_route_VM4VM1="2001:db8:12:: -prefixlen 64 2001:db8:45::4" \ 
-sysrc ipv6_route_R4R2="2001:db8:24:: -prefixlen 64 2001:db8:45::4"+ ipv6_route_VM4VM2="2001:db8:24:: -prefixlen 64 2001:db8:45::4"
 service hostname restart service hostname restart
 service netif restart service netif restart
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 </code> </code>
  
-==== Router 6 (server) ====+==== VM 6 (server) ====
  
-R6, like R1 is configured as a simple host with multiple aliases:+VM 6, like VM 1 is configured as a simple host with multiple aliases:
  
 <code> <code>
-sysrc hostname=R6 +sysrc hostname=VM6 \ 
-sysrc gateway_enable=NO + gateway_enable=NO \ 
-sysrc ipv6_gateway_enable=NO + ipv6_gateway_enable=NO \ 
-sysrc ifconfig_vtnet4="inet 10.0.56.6/24" + ifconfig_vtnet4="inet 10.0.56.6/24" \ 
-sysrc ifconfig_vtnet4_alias1="inet 10.0.56.16/32" + ifconfig_vtnet4_alias1="inet 10.0.56.16/32" \ 
-sysrc ifconfig_vtnet4_alias2="inet 10.0.56.26/32" + ifconfig_vtnet4_alias2="inet 10.0.56.26/32" \ 
-sysrc ifconfig_vtnet4_alias3="inet 10.0.56.36/32" + ifconfig_vtnet4_alias3="inet 10.0.56.36/32" \ 
-sysrc ifconfig_vtnet4_alias4="inet 10.0.56.46/32" + ifconfig_vtnet4_alias4="inet 10.0.56.46/32" \ 
-sysrc ifconfig_vtnet4_alias5="inet 10.0.56.56/32" + ifconfig_vtnet4_alias5="inet 10.0.56.56/32" \ 
-sysrc ifconfig_vtnet4_ipv6="inet6 2001:db8:56::6 prefixlen 64" + ifconfig_vtnet4_ipv6="inet6 2001:db8:56::6 prefixlen 64" \ 
-sysrc ifconfig_vtnet4_alias61="inet6 2001:db8:56::16 prefixlen 64" + ifconfig_vtnet4_alias61="inet6 2001:db8:56::16 prefixlen 64" \ 
-sysrc ifconfig_vtnet4_alias62="inet6 2001:db8:56::26 prefixlen 64" + ifconfig_vtnet4_alias62="inet6 2001:db8:56::26 prefixlen 64" \ 
-sysrc ifconfig_vtnet4_alias63="inet6 2001:db8:56::36 prefixlen 64" + ifconfig_vtnet4_alias63="inet6 2001:db8:56::36 prefixlen 64" \ 
-sysrc ifconfig_vtnet4_alias64="inet6 2001:db8:56::46 prefixlen 64" + ifconfig_vtnet4_alias64="inet6 2001:db8:56::46 prefixlen 64" \ 
-sysrc ifconfig_vtnet4_alias65="inet6 2001:db8:56::56 prefixlen 64" + ifconfig_vtnet4_alias65="inet6 2001:db8:56::56 prefixlen 64" \ 
-sysrc defaultrouter="10.0.56.5" + defaultrouter="10.0.56.5" \ 
-sysrc ipv6_defaultrouter="2001:db8:56::5"+ ipv6_defaultrouter="2001:db8:56::5"
 service hostname restart service hostname restart
 service netif restart service netif restart
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 ==== Testing Load balancing ==== ==== Testing Load balancing ====
  
-Flows from R1 to R6 should be load-balanced by R2 toward R3 and R4. Let's check using multiple sources and destination IP addresses:+Flows from VM1 to VM6 should be "flow-id shared" by VM2 toward VM3 and VM4. Let's check using multiple sources and destination IP addresses. 
 +Using ping record feature like with this example: 
 +<code> 
 +[root@VM1]~# ping -c1 -R -S 10.0.12.21 10.0.56.26 
 +PING 10.0.56.26 (10.0.56.26) from 10.0.12.21: 56 data bytes 
 +64 bytes from 10.0.56.26: icmp_seq=0 ttl=61 time=0.455 ms 
 +RR:     10.0.24.2 
 +        10.0.45.4 
 +        10.0.56.5 
 +        10.0.56.26 
 +        10.0.45.5 
 +        10.0.24.4 
 +        10.0.12.2 
 +        10.0.12.21
  
-^ Source ^ Destination ^ Ongoing path selected by R2 ^ Returning path selected by R5^ +--- 10.0.56.26 ping statistics --- 
-| 10.0.12.1 | 10.0.56.6 | R3 | R3 | +1 packets transmitted, 1 packets received, 0.0% packet loss 
-| 10.0.12.11 | 10.0.56.16 | R3 | R3 | +round-trip min/avg/max/stddev = 0.455/0.455/0.455/0.000 ms 
-| 10.0.12.21 | 10.0.56.26 | R3 | R3 | +</code>
-| 10.0.12.31 | 10.0.56.36 | R3 | R3 | +
-| 10.0.12.41 | 10.0.56.46 | R3 | R3 | +
-| 10.0.12.51 | 10.0.56.56 | R3 | R3 | +
-| 2001:db8:12::1 | 2001:db8:56::6 | R3 | R3 | +
-| 2001:db8:12::11 | 2001:db8:56::16 | R3 | R3 | +
-| 2001:db8:12::21 | 2001:db8:56::26 | R3 | R3 | +
-| 2001:db8:12::31 | 2001:db8:56::36 | R3 | R3 | +
-| 2001:db8:12::41 | 2001:db8:56::46 | R3 | R3 | +
-| 2001:db8:12::51 | 2001:db8:56::56 | R3 | R3 | +
-| 10.0.12.1 | 10.0.45.5 | R4 | R3 |+
  
-<note>There is no flow load-balancing with RADIX MPATH on FreeBSD 11, [[https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225792|seems broken with tryforward]], put proposed patch disable tryforward(fastforward) if RADIX_MPATH is enabled.</note>+^ Source ^ Destination ^ Ongoing path selected by VM2 ^ Returning path selected by VM5^ 
 +| 10.0.12.1 | 10.0.35.5 | VM3 | VM4 | 
 +| 10.0.12.1 | 10.0.45.5 | VM4 | VM4 | 
 +| 10.0.12.1 | 10.0.56.6 | VM4 | VM4 | 
 +| 10.0.12.11 | 10.0.56.16 | VM4 | VM4 | 
 +| 10.0.12.21 | 10.0.56.26 | VM4 | VM4 | 
 +| 10.0.12.31 | 10.0.56.36 | VM4 | VM4 | 
 +| 10.0.12.41 | 10.0.56.46 | VM4 | VM4 | 
 +| 10.0.12.51 | 10.0.56.56 | VM4 | VM4 | 
 +| 2001:db8:12::1 | 2001:db8:56::6 | error | error | 
 +| 2001:db8:12::11 | 2001:db8:56::16 | error | error | 
 +| 2001:db8:12::21 | 2001:db8:56::26 | error | error | 
 +| 2001:db8:12::31 | 2001:db8:56::36 | error | error | 
 +| 2001:db8:12::41 | 2001:db8:56::46 | error | error | 
 +| 2001:db8:12::51 | 2001:db8:56::56 | error | error |
  
 +
 +Notice inet6 bug: Cannot ping itself neither neighbor
 +<code>
 +[root@VM1]~# ifconfig vtnet0 inet6
 +vtnet0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
 +        options=80028<VLAN_MTU,JUMBO_MTU,LINKSTATE>
 +        inet6 fe80::5a9c:fcff:fe01:201%vtnet0 prefixlen 64 scopeid 0x1
 +        inet6 2001:db8:12::1 prefixlen 64
 +        inet6 2001:db8:12::11 prefixlen 64
 +        inet6 2001:db8:12::21 prefixlen 64
 +        inet6 2001:db8:12::31 prefixlen 64
 +        inet6 2001:db8:12::41 prefixlen 64
 +        inet6 2001:db8:12::51 prefixlen 64
 +        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
 +[root@VM1]~# ping6 -c 1 fe80::5a9c:fcff:fe01:201%vtnet0
 +PING6(56=40+8+8 bytes) fe80::5a9c:fcff:fe01:201%vtnet0 --> fe80::5a9c:fcff:fe01:201%vtnet0
 +
 +--- fe80::5a9c:fcff:fe01:201%vtnet0 ping6 statistics ---
 +1 packets transmitted, 0 packets received, 100.0% packet loss
 +[root@VM1]~# ping6 -c 12001:db8:12::2
 +ping6: illegal number of packets -- 12001:db8:12::2
 +[root@VM1]~# ping6 -c 1 2001:db8:12::2
 +PING6(56=40+8+8 bytes) 2001:db8:12::1 --> 2001:db8:12::2
 +
 +--- 2001:db8:12::2 ping6 statistics ---
 +1 packets transmitted, 0 packets received, 100.0% packet loss
 +</code>
 +
 +==== Testing Fail Over ====
 +
 +VM4 is the preferred hop, so shutdown this VM to check behavior:
 +
 +<code>
 +[root@VM4]~# shutdown -p now
 +Shutdown NOW!
 +</code>
 +
 +<code>
 +[root@VM2]~# netstat -4onW
 +Nexthop data
 +
 +Internet:
 +Idx   Type         IFA                Gateway             Flags      Use Mtu         Netif     Addrif Refcnt Prepend
 +4       v4/resolve 10.0.23.2          vtnet1/resolve                   0   1500     vtnet1               1
 +6       v4/resolve 10.0.24.2          vtnet2/resolve                   0   1500     vtnet2               1
 +2       v4/resolve 10.0.12.2          vtnet0/resolve                  11   1500     vtnet0               1
 +1       v4/resolve 127.0.0.1          lo0/resolve        HS            6  16384        lo0               1
 +7       v4/resolve 127.0.0.1          lo0/resolve        HS            0  16384        lo0    vtnet2     1
 +5       v4/resolve 127.0.0.1          lo0/resolve        HS            0  16384        lo0    vtnet1     1
 +3       v4/resolve 127.0.0.1          lo0/resolve        HS            0  16384        lo0    vtnet0     1
 +9            v4/gw 10.0.24.2          10.0.24.4          GS           10   1500     vtnet2               2
 +8            v4/gw 10.0.23.2          10.0.23.3          GS            2   1500     vtnet1               2
 +Nexthop groups data
 +BUF: 192
 +
 +Internet:
 +MpIdx NHIdx Weigh Slots            Gateway Netif      Refcnt
 +1      ---- ---- ----              ----      ----    1
 +          9   100     1          10.0.24.4    vtnet2
 +          8   100     1          10.0.23.3    vtnet1
 +</code>
 +
 +<code>
 +[root@VM1]~# ping -c1 -R -S 10.0.12.21 10.0.56.26
 +PING 10.0.56.26 (10.0.56.26) from 10.0.12.21: 56 data bytes
 +
 +--- 10.0.56.26 ping statistics ---
 +1 packets transmitted, 0 packets received, 100.0% packet loss
 +</code>
documentation/examples/ecmp.txt · Last modified: 2024/03/28 23:19 by olivier
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