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documentation:examples:ecmp [2018/07/13 10:31]
127.0.0.1 external edit
documentation:examples:ecmp [2020/02/19 10:45] (current)
olivier [Testing Load balancing]
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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 79: Line 79:
 ===== Static routing setup ===== ===== Static routing setup =====
  
-==== Router ​1 (client) ====+==== VM 1 (client) ====
  
-R1 is configured as a simple host with multiples aliases:+VM1 is configured as a simple host with multiples aliases:
  
 <​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
Line 107: Line 107:
 </​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
Line 135: Line 135:
 </​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 
 +</​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
Line 157: Line 196:
 </​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
Line 207: Line 246:
 </​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
Line 237: Line 276:
 ==== 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.1531470677.txt.gz · Last modified: 2018/07/13 10:31 by 127.0.0.1