R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

139
If only two routers exist on a broadcast network, configure the network type of attached interfaces as P2P
to avoid DIS election and CSNP flooding, saving network bandwidth and speeding up network
convergence.
To configure P2P network type for an interface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure P2P network type for an
interface.
isis circuit-type p2p
By default, the network type of an
interface depends on the physical
media. The network type of a
VLAN interface is broadcast.
Configuring IS-IS route control
Configuration prerequisites
Before the configuration, complete the following tasks:
• Configure IP addresses for interfaces to ensure IP connectivity between neighboring nodes.
• Enable IS-IS.
Configuring IS-IS link cost
The IS-IS cost of an interface is determined in the following order:
1. IS-IS cost specified in interface view.
2. IS-IS cost specified in system view.
The cost is applied to the interfaces associated with the IS-IS process.
3. Automatically calculated cost.
If the cost style is wide or wide-compatible, IS-IS automatically calculates the cost using the formula:
Interface cost = (Bandwidth reference value / Expected interface bandwidth) × 10, in the range of
1 to 16777214. For other cost styles, Table 10 applies.
Configu
r
e the expected bandwidth of an interface with the bandwidth command. For more
information, see Interface Command Reference.
Table 10 Automatic cost calculation scheme for cost styles other than wide and
wide-compatible
Interface bandwidth Interface cost
≤ 10 Mbps 60
≤ 100 Mbps 50
≤ 155 Mbps 40
≤ 622 Mbps 30
≤ 2500 Mbps 20