r6和r7是L1级路由,可以获取到L1级其他路由器的明细路由,但是获取不到L2级路由信息,连L1级的缺省路由都没有,各位大神请问这是系统bug吗?
<r3>dis cu
#
version 7.1.064, Release 0427P22
#
sysname r3
#
isis 1
is-level level-2
network-entity 10.0000.0000.0001.00
#
address-family ipv4 unicast
import-route direct
import-route ospf 1
#
ospf 1 router-id 3.3.3.3
import-route direct
import-route isis 1
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 10.0.2.0 0.0.0.255
network 10.0.3.0 0.0.0.255
#
ip ttl-expires enable
#
system-working-mode standard
xbar load-single
password-recovery enable
lpu-type f-series
#
vlan 1
#
interface Serial1/0
#
interface Serial2/0
#
interface Serial3/0
#
interface Serial4/0
#
interface NULL0
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
interface GigabitEthernet0/0
port link-mode route
combo enable copper
ip address 10.0.2.3 255.255.255.0
#
interface GigabitEthernet0/1
port link-mode route
combo enable copper
ip address 10.0.3.3 255.255.255.0
#
interface GigabitEthernet0/2
port link-mode route
combo enable copper
ip address 10.0.5.3 255.255.255.0
isis enable 1
R5:
[r5]dis cu
#
version 7.1.064, Release 0427P22
#
sysname r5
#
isis 1
network-entity 10.0000.0000.0002.00
#
address-family ipv4 unicast
#
ip ttl-expires enable
#
sysid r5
#
system-working-mode standard
xbar load-single
password-recovery enable
lpu-type f-series
#
vlan 1
#
interface Serial1/0
#
interface Serial2/0
#
interface Serial3/0
#
interface Serial4/0
#
interface NULL0
#
interface LoopBack0
ip address 5.5.5.5 255.255.255.255
isis enable 1
#
interface LoopBack1
ip address 192.168.10.1 255.255.255.0
isis enable 1
#
interface LoopBack2
ip address 192.168.12.1 255.255.255.0
isis enable 1
#
interface LoopBack3
isis enable 1
#
interface LoopBack4
ip address 192.168.13.1 255.255.255.0
isis enable 1
#
interface GigabitEthernet0/0
port link-mode route
combo enable copper
ip address 10.0.5.5 255.255.255.0
isis enable 1
#
interface GigabitEthernet0/1
port link-mode route
combo enable copper
ip address 10.0.6.5 255.255.255.0
isis enable 1
#
interface GigabitEthernet0/2
port link-mode route
combo enable copper
ip address 10.0.7.5 255.255.255.0
isis enable 1
R6:
<r6> DIS CU
#
version 7.1.064, Release 0427P22
#
sysname r6
#
isis 1
is-level level-1
network-entity 10.0000.0000.0003.00
#
ip ttl-expires enable
#
system-working-mode standard
xbar load-single
password-recovery enable
lpu-type f-series
#
vlan 1
#
interface Serial1/0
#
interface Serial2/0
#
interface Serial3/0
#
interface Serial4/0
#
interface NULL0
#
interface LoopBack0
ip address 6.6.6.6 255.255.255.255
isis enable 1
#
interface LoopBack1
ip address 192.168.100.1 255.255.255.0
isis enable 1
#
interface LoopBack2
ip address 192.168.101.1 255.255.255.0
isis enable 1
#
interface LoopBack3
ip address 192.168.102.1 255.255.255.0
isis enable 1
#
interface LoopBack4
ip address 192.168.103.1 255.255.255.0
isis enable 1
#
interface GigabitEthernet0/0
port link-mode route
combo enable copper
ip address 10.0.6.6 255.255.255.0
isis enable 1
#
R6的路由表:
<r6>DIS IP routing-table
Destinations : 29 Routes : 29
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
5.5.5.5/32 IS_L1 15 10 10.0.6.5 GE0/0
6.6.6.6/32 Direct 0 0 127.0.0.1 InLoop0
10.0.5.0/24 IS_L1 15 20 10.0.6.5 GE0/0
10.0.6.0/24 Direct 0 0 10.0.6.6 GE0/0
10.0.6.6/32 Direct 0 0 127.0.0.1 InLoop0
10.0.6.255/32 Direct 0 0 10.0.6.6 GE0/0
10.0.7.0/24 IS_L1 15 20 10.0.6.5 GE0/0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
192.168.10.0/24 IS_L1 15 10 10.0.6.5 GE0/0
192.168.12.0/24 IS_L1 15 10 10.0.6.5 GE0/0
192.168.13.0/24 IS_L1 15 10 10.0.6.5 GE0/0
192.168.100.0/24 Direct 0 0 192.168.100.1 Loop1
192.168.100.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.100.255/32 Direct 0 0 192.168.100.1 Loop1
192.168.101.0/24 Direct 0 0 192.168.101.1 Loop2
192.168.101.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.101.255/32 Direct 0 0 192.168.101.1 Loop2
192.168.102.0/24 Direct 0 0 192.168.102.1 Loop3
192.168.102.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.102.255/32 Direct 0 0 192.168.102.1 Loop3
192.168.103.0/24 Direct 0 0 192.168.103.1 Loop4
192.168.103.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.103.255/32 Direct 0 0 192.168.103.1 Loop4
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
<r6>
(0)
最佳答案
在IS-IS网络中,L1和L2级的路由器之间连接时,L1级路由器不会产生缺省路由。这是因为在IS-IS协议中,L1级路由器只负责在同一级内部进行路由信息交换,不会向L2级路由器传递任何L1级的路由信息。因此,L1级路由器不会形成默认路由条目到L2级路由器。
(0)
正常来说,有外部路由引入时,因为L2路由信息不会传给L1,所以L1-2路由器会传一个L1的缺省路由给L1路由器吗?
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正常来说,有外部路由引入时,因为L2路由信息不会传给L1,所以L1-2路由器会传一个L1的缺省路由给L1路由器吗?