H3C Technologies H3C SR8800 - Manual (Page 200)

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IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags
--------------------------------------------------------------------------
10.1.1.0/24 10 NULL GE3/1/2 Direct D/L/-
10.1.2.0/24 10 NULL GE3/1/1 Direct D/L/-
192.168.0.0/24 10 NULL GE3/1/3 Direct D/L/-
Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set
ISIS(1) IPv4 Level-2 Forwarding Table
-------------------------------------
IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags
--------------------------------------------------------------------------
10.1.1.0/24 10 NULL GE3/1/2 Direct D/L/-
10.1.2.0/24 10 NULL GE3/1/1 Direct D/L/-
192.168.0.0/24 10 NULL GE3/1/3 Direct D/L/-
10.1.4.0/24 10 NULL GE3/1/3 192.168.0.2 R/L/-
10.1.5.0/24 20 NULL GE3/1/3 192.168.0.2 R/L/-
10.1.6.0/24 20 NULL GE3/1/3 192.168.0.2 R/L/-
Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set
IS-IS GR configuration example
Network requirements
Router A, Router B, and Router C belong to the same IS-IS routing domain, as illustrated in Figure 67 .
Figure 67 Network diagram
Configuration procedure
1. Configure IP addresses of the interfaces on each router and configure IS-IS:
Follow
Figure 67 to configure the IP address and subnet mask of each interface on the router.
(Details not shown)
Configure IS-IS on the routers, making sure that Router A, Router B and Router C can communicate
with each other at Layer 3 and dynamic route update can be implemented among them with IS-IS.
(Details not shown)
2. Configure IS-IS Graceful Restart:
GE1/1/1
10.0.0.1/24
GE1/1/1
10.0.0.3/24
GE1/1/1
10.0.0.2/24
GR helper GR helper
GR restarter
Router A
Router C Router B