IS-IS route redistribution configuration example
Network requirements
As shown in Figure 42, Switch A, Switch B, Switch C, and Switch D reside in the same AS. They use IS-IS to interconnect. Switch A and Switch B are Level-1 routers, Switch D is a Level-2 router, and Switch C is a Level-1-2 router.
Redistribute RIP routes into IS-IS on Switch D.
Figure 42: Network diagram
Configuration procedure
Configure IP addresses for interfaces. (Details not shown.)
Configure basic IS-IS:
# Configure Switch A.
<SwitchA> system-view [SwitchA] isis 1 [SwitchA-isis-1] is-level level-1 [SwitchA-isis-1] network-entity 10.0000.0000.0001.00 [SwitchA-isis-1] quit [SwitchA] interface vlan-interface 100 [SwitchA-Vlan-interface100] isis enable 1 [SwitchA-Vlan-interface100] quit
# Configure Switch B.
<SwitchB> system-view [SwitchB] isis 1 [SwitchB-isis-1] is-level level-1 [SwitchB-isis-1] network-entity 10.0000.0000.0002.00 [SwitchB-isis-1] quit [SwitchB] interface vlan-interface 200 [SwitchB-Vlan-interface200] isis enable 1 [SwitchB-Vlan-interface200] quit
# Configure Switch C.
<SwitchC> system-view [SwitchC] isis 1 [SwitchC-isis-1] network-entity 10.0000.0000.0003.00 [SwitchC-isis-1] quit [SwitchC] interface vlan-interface 200 [SwitchC-Vlan-interface200] isis enable 1 [SwitchC-Vlan-interface200] quit [SwitchC] interface vlan-interface 100 [SwitchC-Vlan-interface100] isis enable 1 [SwitchC-Vlan-interface100] quit [SwitchC] interface vlan-interface 300 [SwitchC-Vlan-interface300] isis enable 1 [SwitchC-Vlan-interface300] quit
# Configure Switch D.
<SwitchD> system-view [SwitchD] isis 1 [SwitchD-isis-1] is-level level-2 [SwitchD-isis-1] network-entity 20.0000.0000.0004.00 [SwitchD-isis-1] quit [SwitchD] interface interface vlan-interface 300 [SwitchD-Vlan-interface300] isis enable 1 [SwitchD-Vlan-interface300] quit
# Display IS-IS routing information on each switch.
[SwitchA] display isis route Route information for IS-IS(1) ------------------------------ Level-1 IPv4 Forwarding Table ----------------------------- IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags ------------------------------------------------------------------------------- 10.1.1.0/24 10 NULL VLAN100 Direct D/L/- 10.1.2.0/24 20 NULL VLAN100 10.1.1.1 R/-/- 192.168.0.0/24 20 NULL VLAN100 10.1.1.1 R/-/- 0.0.0.0/0 10 NULL VLAN100 10.1.1.1 R/-/- Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set [SwitchC] display isis route Route information for IS-IS(1) ------------------------------ Level-1 IPv4 Forwarding Table ----------------------------- IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags ------------------------------------------------------------------------------- 10.1.1.0/24 10 NULL VLAN100 Direct D/L/- 10.1.2.0/24 10 NULL VLAN200 Direct D/L/- 192.168.0.0/24 10 NULL VLAN300 Direct D/L/- Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set Level-2 IPv4 Forwarding Table ----------------------------- IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags ------------------------------------------------------------------------------- 10.1.1.0/24 10 NULL VLAN100 Direct D/L/- 10.1.2.0/24 10 NULL VLAN200 Direct D/L/- 192.168.0.0/24 10 NULL VLAN300 Direct D/L/- Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set [SwitchD] display isis route Route information for IS-IS(1) ------------------------------ Level-2 IPv4 Forwarding Table ----------------------------- IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags ------------------------------------------------------------------------------- 192.168.0.0/24 10 NULL VLAN300 Direct D/L/- 10.1.1.0/24 20 NULL VLAN300 192.168.0.1 R/-/- 10.1.2.0/24 20 NULL VLAN300 192.168.0.1 R/-/- Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit SetRun RIPv2 between Switch D and Switch E, and configure IS-IS to redistribute RIP routes on Switch D:
# Configure RIPv2 on Switch D.
[SwitchD] rip 1 [SwitchD-rip-1] network 10.0.0.0 [SwitchD-rip-1] version 2 [SwitchD-rip-1] undo summary
# Configure RIPv2 on Switch E.
[SwitchE] rip 1 [SwitchE-rip-1] network 10.0.0.0 [SwitchE-rip-1] version 2 [SwitchE-rip-1] undo summary
# Configure IS-IS to redistribute RIP routes on Switch D.
[SwitchD-rip-1] quit [SwitchD] isis 1 [SwitchD–isis-1] import-route rip level-2
# Display IS-IS routing information on Switch C.
[SwitchC] display isis route Route information for IS-IS(1) ------------------------------ Level-1 IPv4 Forwarding Table ----------------------------- IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags ------------------------------------------------------------------------------- 10.1.1.0/24 10 NULL VLAN100 Direct D/L/- 10.1.2.0/24 10 NULL VLAN200 Direct D/L/- 192.168.0.0/24 10 NULL VLAN300 Direct D/L/- Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set Level-2 IPv4 Forwarding Table ----------------------------- IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags ------------------------------------------------------------------------------- 10.1.1.0/24 10 NULL VLAN100 Direct D/L/- 10.1.2.0/24 10 NULL VLAN200 Direct D/L/- 192.168.0.0/24 10 NULL VLAN300 Direct D/L/- 10.1.4.0/24 10 NULL VLAN300 192.168.0.2 R/L/- 10.1.5.0/24 20 NULL VLAN300 192.168.0.2 R/L/- 10.1.6.0/24 20 NULL VLAN300 192.168.0.2 R/L/- Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set