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documentation:examples:ecmp [2022/12/11 18:14] – [R2 (ECMP router)] olivierdocumentation:examples:ecmp [2024/03/28 23:19] (current) – [Equal-cost multi-path routing (ECMP)] olivier
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 ====== Equal-cost multi-path routing (ECMP) ====== ====== Equal-cost multi-path routing (ECMP) ======
  
-This lab need a FreeBSD 13-head r366390 minimum ([[https://reviews.freebsd.org/D26449|new ECMP routing code ]]) 
 ===== Presentation ===== ===== Presentation =====
  
Line 22: Line 21:
 ==== Client ==== ==== Client ====
  
-A simple host with multiples aliases:+A simple host with static routes:
  
 <code> <code>
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   ipv6_gateway_enable=NO \   ipv6_gateway_enable=NO \
   ifconfig_igb1="inet 10.0.12.1/24" \   ifconfig_igb1="inet 10.0.12.1/24" \
-  ifconfig_igb1_alias1="inet 10.0.12.11/32" \ 
-  ifconfig_igb1_alias2="inet 10.0.12.21/32" \ 
-  ifconfig_igb1_alias3="inet 10.0.12.31/32" \ 
-  ifconfig_igb1_alias4="inet 10.0.12.41/32" \ 
-  ifconfig_igb1_alias5="inet 10.0.12.51/32" \ 
   ifconfig_igb1_ipv6="inet6 2001:db8:12::3 prefixlen 64" \   ifconfig_igb1_ipv6="inet6 2001:db8:12::3 prefixlen 64" \
-  ifconfig_igb1_alias61="inet6 2001:db8:12::11 prefixlen 64" \ 
-  ifconfig_igb1_alias62="inet6 2001:db8:12::21 prefixlen 64" \ 
-  ifconfig_igb1_alias63="inet6 2001:db8:12::31 prefixlen 64" \ 
-  ifconfig_igb1_alias64="inet6 2001:db8:12::41 prefixlen 64" \ 
-  ifconfig_igb1_alias65="inet6 2001:db8:12::51 prefixlen 64" \ 
   static_routes="LAB" \   static_routes="LAB" \
   route_LAB="-net 10.0.0.0/16 10.0.12.2" \   route_LAB="-net 10.0.0.0/16 10.0.12.2" \
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   ifconfig_igb2_ipv6="inet6 2001:db8:232::3 prefixlen 64" \   ifconfig_igb2_ipv6="inet6 2001:db8:232::3 prefixlen 64" \
   static_routes="DST1 DST2 SRC1 SRC2" \   static_routes="DST1 DST2 SRC1 SRC2" \
-  route_DST1="-net 10.0.0.0/16 10.0.231.3" \ +  route_DST1="-net 10.0.0.0/16 10.0.231.4" \ 
-  route_DST2="-net 10.0.0.0/16 10.0.232.3" \+  route_DST2="-net 10.0.0.0/16 10.0.232.4" \
   route_SRC1="-net 10.0.12.0/24 10.0.231.2" \   route_SRC1="-net 10.0.12.0/24 10.0.231.2" \
   route_SRC2="-net 10.0.12.0/24 10.0.232.2" \   route_SRC2="-net 10.0.12.0/24 10.0.232.2" \
   ipv6_static_routes="DST1 DST2 SRC1 SRC2" \   ipv6_static_routes="DST1 DST2 SRC1 SRC2" \
-  ipv6_route_MPATH1="2001:db8:: -prefixlen 32 2001:db8:231::3" \ +  ipv6_route_MPATH1="2001:db8:: -prefixlen 32 2001:db8:231::4" \ 
-  ipv6_route_MPATH2="2001:db8:: -prefixlen 32 2001:db8:231::3" \+  ipv6_route_MPATH2="2001:db8:: -prefixlen 32 2001:db8:231::4" \
   ipv6_route_SRC1="2001:db8:12:: -prefixlen 64 2001:db8:231::2" \   ipv6_route_SRC1="2001:db8:12:: -prefixlen 64 2001:db8:231::2" \
   ipv6_route_SRC2="2001:db8:12:: -prefixlen 64 2001:db8:231::2"   ipv6_route_SRC2="2001:db8:12:: -prefixlen 64 2001:db8:231::2"
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 ==== Server ==== ==== Server ====
  
-A simple host with multiple aliases:+A simple host with some static routes:
  
 <code> <code>
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   ipv6_gateway_enable=NO \   ipv6_gateway_enable=NO \
   ifconfig_igb1="inet 10.0.34.4/24" \   ifconfig_igb1="inet 10.0.34.4/24" \
-  ifconfig_igb1_alias1="inet 10.0.34.14/32" \ 
-  ifconfig_igb1_alias2="inet 10.0.34.24/32" \ 
-  ifconfig_igb1_alias3="inet 10.0.34.34/32" \ 
-  ifconfig_igb1_alias4="inet 10.0.34.44/32" \ 
-  ifconfig_igb1_alias5="inet 10.0.34.54/32" \ 
   ifconfig_igb1_ipv6="inet6 2001:db8:34::4 prefixlen 64" \   ifconfig_igb1_ipv6="inet6 2001:db8:34::4 prefixlen 64" \
-  ifconfig_igb1_alias61="inet6 2001:db8:34::14 prefixlen 64" \ 
-  ifconfig_igb1_alias62="inet6 2001:db8:34::24 prefixlen 64" \ 
-  ifconfig_igb1_alias63="inet6 2001:db8:34::34 prefixlen 64" \ 
-  ifconfig_igb1_alias64="inet6 2001:db8:34::44 prefixlen 64" \ 
-  ifconfig_igb1_alias65="inet6 2001:db8:34::54 prefixlen 64" \ 
   static_routes="12 231 232" \   static_routes="12 231 232" \
   route_12="-net 10.0.12.0/24 10.0.34.3" \   route_12="-net 10.0.12.0/24 10.0.34.3" \
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 ==== R1 (ECMP router) ==== ==== R1 (ECMP router) ====
  
-In place of static routes, FRR is enabled:+In place of static routes, OSPF with FRR is used:
  
 <code> <code>
Line 196: Line 175:
  
 cat > /usr/local/etc/frr/frr.conf <EOF cat > /usr/local/etc/frr/frr.conf <EOF
-frr version 7.4+frr version 8.4.1
 frr defaults traditional frr defaults traditional
-hostname homelab1+hostname R1
 ! !
 interface igb0 interface igb0
 + ip ospf passive
 + ipv6 ospf6 area 0.0.0.0
  ipv6 ospf6 passive  ipv6 ospf6 passive
 +exit
 +!
 +interface igb1
 + ipv6 ospf6 area 0.0.0.0
 +exit
 +!
 +interface igb2
 + ipv6 ospf6 area 0.0.0.0
 +exit
 ! !
 router ospf router ospf
  ospf router-id 1.1.1.1  ospf router-id 1.1.1.1
- passive-interface igb0 
  network 10.0.12.0/24 area 0  network 10.0.12.0/24 area 0
  network 10.0.231.0/24 area 0  network 10.0.231.0/24 area 0
  network 10.0.232.0/24 area 0  network 10.0.232.0/24 area 0
 +exit
 ! !
 router ospf6 router ospf6
- interface igb0 area 0.0.0.0 +exit
- interface igb1 area 0.0.0.0 +
- interface igb2 area 0.0.0.0 +
-! +
-line vty+
 ! !
 EOF EOF
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 ==== R2 (ECMP router) ==== ==== R2 (ECMP router) ====
  
-In place of static routes, FRR is enabled:+Same as R1 with OSPF and FRR:
 <code> <code>
 sysrc frr_vtysh_boot="YES" \ sysrc frr_vtysh_boot="YES" \
   frr_enable="YES" \   frr_enable="YES" \
-  frr_daemons="zebra ospfd ospf6d" \+  frr_daemons="zebra staticd ospfd ospf6d" \
   watchfrr_flags=" -d -r /usr/sbin/servicebBfrrbBrestartbB%s -s /usr/sbin/servicebBfrrbBstartbB%s -k /usr/sbin/servicebBfrrbBstopbB%s -b bB -t 30 zebra ospfd ospf6d" \   watchfrr_flags=" -d -r /usr/sbin/servicebBfrrbBrestartbB%s -s /usr/sbin/servicebBfrrbBstartbB%s -k /usr/sbin/servicebBfrrbBstopbB%s -b bB -t 30 zebra ospfd ospf6d" \
   watchfrr_enable="YES"   watchfrr_enable="YES"
  
 cat > /usr/local/etc/frr/frr.conf <EOF cat > /usr/local/etc/frr/frr.conf <EOF
-frr version 7.4+frr version 8.4.1
 frr defaults traditional frr defaults traditional
 hostname R2 hostname R2
 +!
 +ip route 10.0.0.0/16 10.0.34.4
 +ipv6 route 2001:db8::/32 2001:db8:231::4
 ! !
 interface igb0 interface igb0
 + ip ospf passive
 + ipv6 ospf6 area 0.0.0.0
  ipv6 ospf6 passive  ipv6 ospf6 passive
 +exit
 +!
 +interface igb1
 + ipv6 ospf6 area 0.0.0.0
 +exit
 +!
 +interface igb2
 + ipv6 ospf6 area 0.0.0.0
 +exit
 ! !
 router ospf router ospf
  ospf router-id 2.2.2.2  ospf router-id 2.2.2.2
- passive-interface igb0+ redistribute static
  network 10.0.34.0/24 area 0  network 10.0.34.0/24 area 0
  network 10.0.231.0/24 area 0  network 10.0.231.0/24 area 0
  network 10.0.232.0/24 area 0  network 10.0.232.0/24 area 0
 +exit
 ! !
 router ospf6 router ospf6
- interface igb0 area 0.0.0.0 + redistribute static 
- interface igb1 area 0.0.0.0 +exit
- interface igb2 area 0.0.0.0 +
-! +
-line vty+
 ! !
 EOF EOF
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 On R1: On R1:
 <code> <code>
-[root@router1]~# vtysh +root@R1:~ # vtysh 
- +Hello, this is FRRouting (version 8.4.1).
-Hello, this is FRRouting (version 7.4).+
 Copyright 1996-2005 Kunihiro Ishiguro, et al. Copyright 1996-2005 Kunihiro Ishiguro, et al.
  
-router1# sh ip route 10.0.24.0/24 +R1# sh ip route 10.0.0.0 
-Routing entry for 10.0.24.0/24+Routing entry for 10.0.0.0/16
   Known via "ospf", distance 110, metric 20, best   Known via "ospf", distance 110, metric 20, best
-  Last update 00:06:39 ago +  Last update 00:02:26 ago 
-  * 10.0.112.2, via igb1, weight 1 +  * 10.0.231.3, via igb1, weight 1 
-  * 10.0.212.2, via igb2, weight 1+  * 10.0.232.3, via igb2, weight 1
  
-route1# sh ipv6 route 2001:db8:24::/64 +R1# sh ipv6 route 2001:db8:: 
-Routing entry for 2001:db8:24::/64+Routing entry for 2001:db8::/32
   Known via "ospf6", distance 110, metric 20, best   Known via "ospf6", distance 110, metric 20, best
-  Last update 00:02:42 ago+  Last update 00:02:39 ago
   * fe80::20d:b9ff:fe45:7ad5, via igb1, weight 1   * fe80::20d:b9ff:fe45:7ad5, via igb1, weight 1
   * fe80::20d:b9ff:fe45:7ad6, via igb2, weight 1   * fe80::20d:b9ff:fe45:7ad6, via igb2, weight 1
- 
- 
-router1# exit 
- 
-[root@router1]~# netstat -rn4 | grep 10.0.24.0/24 
-10.0.24.0/24       10.0.212.2         UG1        igb2 
-10.0.24.0/24       10.0.112.2         UG1        igb1 
- 
-[root@router1]~# netstat -rn6 | grep 2001:db8:24::/64 
-2001:db8:24::/64                  fe80::20d:b9ff:fe45:7ad6%igb2 UG1        igb2 
-2001:db8:24::/64                  fe80::20d:b9ff:fe45:7ad5%igb1 UG1        igb1 
- 
 </code> </code>
  
documentation/examples/ecmp.1670778842.txt.gz · Last modified: 2022/12/11 18:14 by olivier
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