recently I have an assignment and trying to configure HSRP of my layer 3 switches in cisco packet tracer.
After multiple attempts 2 of my layer 3 switches is still unable to get the standby router of one another.
These are the running config files of the switches respectively:
S4:
S4#sh run
Building configuration...
Current configuration : 2384 bytes
!
version 16.3.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname S4
!
!
!
!
!
!
!
no ip cef
ip routing
!
no ipv6 cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface Port-channel4
switchport mode trunk
!
interface GigabitEthernet1/0/1
switchport mode trunk
channel-group 4 mode active
!
interface GigabitEthernet1/0/2
switchport mode trunk
channel-group 4 mode active
!
interface GigabitEthernet1/0/3
no switchport
ip address 192.168.1.18 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet1/0/4
!
interface GigabitEthernet1/0/5
!
interface GigabitEthernet1/0/6
!
interface GigabitEthernet1/0/7
!
interface GigabitEthernet1/0/8
!
interface GigabitEthernet1/0/9
!
interface GigabitEthernet1/0/10
!
interface GigabitEthernet1/0/11
!
interface GigabitEthernet1/0/12
!
interface GigabitEthernet1/0/13
!
interface GigabitEthernet1/0/14
!
interface GigabitEthernet1/0/15
!
interface GigabitEthernet1/0/16
!
interface GigabitEthernet1/0/17
!
interface GigabitEthernet1/0/18
!
interface GigabitEthernet1/0/19
!
interface GigabitEthernet1/0/20
!
interface GigabitEthernet1/0/21
!
interface GigabitEthernet1/0/22
!
interface GigabitEthernet1/0/23
no switchport
ip address 192.168.1.6 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet1/0/24
no switchport
ip address 192.168.1.14 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet1/1/1
!
interface GigabitEthernet1/1/2
!
interface GigabitEthernet1/1/3
!
interface GigabitEthernet1/1/4
!
interface Vlan1
ip address 192.168.0.2 255.255.255.0
standby version 2
standby 1 ip 192.168.0.253
standby 1 preempt
!
interface Vlan10
mac-address 0010.11cb.1201
ip address 192.168.10.25 255.255.255.252
!
interface Vlan11
mac-address 0010.11cb.1202
ip address 192.168.10.17 255.255.255.248
!
interface Vlan12
mac-address 0010.11cb.1203
ip address 192.168.10.1 255.255.255.240
!
ip classless
ip route 192.168.20.0 255.255.255.224 192.168.1.17
ip route 192.168.20.32 255.255.255.248 192.168.1.17
ip route 192.168.20.40 255.255.255.252 192.168.1.17
ip route 0.0.0.0 0.0.0.0 192.168.1.5
ip route 0.0.0.0 0.0.0.0 192.168.1.13
ip route 192.168.0.0 255.255.255.0 GigabitEthernet1/0/3
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
!
end
S3:
S3#sh run
Building configuration...
Current configuration : 2448 bytes
!
version 16.3.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname S3
!
!
!
!
!
!
!
no ip cef
ip routing
!
no ipv6 cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface Port-channel2
!
interface Port-channel3
!
interface Port-channel5
!
interface GigabitEthernet1/0/1
channel-group 2 mode active
!
interface GigabitEthernet1/0/2
channel-group 2 mode active
!
interface GigabitEthernet1/0/3
channel-group 3 mode active
!
interface GigabitEthernet1/0/4
channel-group 3 mode active
!
interface GigabitEthernet1/0/5
no switchport
ip address 192.168.1.17 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet1/0/6
!
interface GigabitEthernet1/0/7
!
interface GigabitEthernet1/0/8
!
interface GigabitEthernet1/0/9
!
interface GigabitEthernet1/0/10
!
interface GigabitEthernet1/0/11
!
interface GigabitEthernet1/0/12
!
interface GigabitEthernet1/0/13
!
interface GigabitEthernet1/0/14
!
interface GigabitEthernet1/0/15
!
interface GigabitEthernet1/0/16
!
interface GigabitEthernet1/0/17
!
interface GigabitEthernet1/0/18
!
interface GigabitEthernet1/0/19
!
interface GigabitEthernet1/0/20
!
interface GigabitEthernet1/0/21
!
interface GigabitEthernet1/0/22
!
interface GigabitEthernet1/0/23
no switchport
ip address 192.168.1.1 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet1/0/24
no switchport
ip address 192.168.1.10 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet1/1/1
!
interface GigabitEthernet1/1/2
!
interface GigabitEthernet1/1/3
!
interface GigabitEthernet1/1/4
!
interface Vlan1
ip address 192.168.0.1 255.255.255.0
standby version 2
standby 1 ip 192.168.0.253
standby 1 priority 105
standby 1 preempt
!
interface Vlan20
mac-address 0040.0bab.3601
ip address 192.168.20.41 255.255.255.252
!
interface Vlan21
mac-address 0040.0bab.3602
ip address 192.168.20.33 255.255.255.248
!
interface Vlan22
mac-address 0040.0bab.3603
ip address 192.168.20.1 255.255.255.224
!
ip classless
ip route 192.168.10.0 255.255.255.240 192.168.1.18
ip route 192.168.10.16 255.255.255.248 192.168.1.18
ip route 192.168.10.24 255.255.255.252 192.168.1.18
ip route 0.0.0.0 0.0.0.0 192.168.1.2
ip route 0.0.0.0 0.0.0.0 192.168.1.9
ip route 192.168.0.0 255.255.255.0 GigabitEthernet1/0/5
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
!
end
Not sure how am I able to get S3 to become the active router and S4 to become the standby router
are there any solutions?
I've tried inter connecting the layer 2 switches to one another too but still nothing changes etc.
Related
I wanted to configure Frame Relay. I have 3 networks.
192.168.1.0 network and 192.168.3.0 network can communicate each other but 192.168.1.0 network and 192.168.5.0 network can not communicate each other.
They could communicate in my last try. I do not know what changed.
 The configuration of Router0
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX152430AA-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
ip address 192.168.1.2 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0/0
no ip address
encapsulation frame-relay
!
interface Serial0/0/0.100 point-to-point
ip address 10.11.1.1 255.255.0.0
frame-relay interface-dlci 100
clock rate 2000000
!
interface Serial0/0/0.101 point-to-point
ip address 10.10.1.1 255.255.0.0
frame-relay interface-dlci 101
clock rate 2000000
!
interface Serial0/0/1
no ip address
clock rate 2000000
shutdown
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip route 192.168.5.0 255.255.255.0 10.11.1.2
ip route 192.168.3.0 255.255.255.0 10.10.1.2
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end
The configuration of Router1
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX1524K7OH-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
ip address 192.168.5.2 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0/0
ip address 10.11.1.2 255.255.0.0
encapsulation frame-relay
frame-relay interface-dlci 102
!
interface Serial0/0/1
no ip address
clock rate 2000000
shutdown
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip route 192.168.1.0 255.255.255.0 10.11.1.1
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end
The configuration of Router2
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX15244E52-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
ip address 192.168.3.2 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0/0
ip address 10.10.1.2 255.255.0.0
encapsulation frame-relay
frame-relay interface-dlci 103
!
interface Serial0/0/1
no ip address
clock rate 2000000
shutdown
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip route 192.168.1.0 255.255.255.0 10.10.1.1
!
ip flow-export version 9
!
!
!
no cdp run
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end
I know that we can add arp entry in windows using arp -s IP MAC
I need a command to add such entry for a specific interface if I have many
While I have those two interfaces
Interface: 10.243.16.11 --- 0xe
Interface: 192.168.1.179 --- 0x17
The arp command under Linux has a -i flag for specifying the interface but the Windows one is slightly different.
If you run arp on its own, you'll see how to do it:
ARP -s inet_addr eth_addr [if_addr]
ARP -d inet_addr [if_addr]
ARP -a [inet_addr] [-N if_addr] [-v]
You need to provide the IP address if_addr for the specific interface you want to affect. For example:
C:\Users\Pax>arp -a
Interface: 192.168.0.72 --- 0x1c
Internet Address Physical Address Type
192.168.0.1 80-20-da-a0-f9-3d dynamic
Interface: 172.23.128.1 --- 0x33
Internet Address Physical Address Type
172.23.143.255 ff-ff-ff-ff-ff-ff static
C:\Users\Pax>arp -s 192.90.90.90 80-20-da-a0-f9-33 172.23.128.1
C:\Users\Pax>arp -a
Interface: 192.168.0.72 --- 0x1c
Internet Address Physical Address Type
255.255.255.255 ff-ff-ff-ff-ff-ff static
Interface: 172.23.128.1 --- 0x33
Internet Address Physical Address Type
172.23.143.255 ff-ff-ff-ff-ff-ff static
192.90.90.90 80-20-da-a0-f9-33 static
You can see there that the arp entry has been added to the cache for the specific interface.
For debugging purpose I need to set up a MITM proxy between 2 devices.
All devices have static IP (example) and are directly connected each other:
Device 1 : 192.168.10.50
Device 2 : 192.168.10.60
Proxy computer have 2 nic on the same subnet and is between other devices :
D1 .50 <=> [.60 PROXY .50] <=> D2 .60
My problem is, from the proxy if one of the 2 nic is disabled, D1 or D2 can reach the proxy.
Once I bring up the 2 nic, no one can see any other device.
D1 and D2 ip can't be changed.
Proxy is linux centos 8.
Already tested :
adding log on iptables : if 2 nic are up no more input / output log
Drop all input / output then accept only right ip from right interface => no result
Changing arp_filter = 1 and arp_announce = 2 => no result
Testing multiple SO post about 2 nic on same subnet
If anyone can help.
Thanks .
I've found a solution which consist in creating a transparent proxy and intercept some packets.
1- Create a bridge with the 2 NIC :
nmcli connection add type bridge autoconnect yes con-name "br0" ifname "br0"
nmcli connection modify "br0" ipv4.addresses "192.168.10.10/24" ipv4.method manual
nmcli connection delete enp0s3
nmcli connection delete enp0s8
nmcli connection add type bridge-slave autoconnect yes con-name enp0s3 ifname enp0s3 master br0
nmcli connection add type bridge-slave autoconnect yes con-name enp0s8 ifname enp0s8 master br0
2 Add correct rules to intercept specific traffic
nft add table bridge mitm
nft add chain bridge mitm filter { type filter hook prerouting priority 0\; }
nft add rule bridge mitm filter tcp dport 10000 ip saddr 192.168.10.50 meta pkttype set host ether daddr set xx:xx:xx:xx:xx:xx # br0 mac address
nft add rule ip nat PREROUTING tcp dport 10000 ip saddr 192.168.10.50 dnat to 192.168.10.10
It worked for me.
I'm new to Brocade/NetIron but I thought the config was similar to Cisco until we tried to hook up a new transit provider. Routes don't seem to be loading correctly and we have an issue pinging our router on the Cogent issued IP that we have added onto the interface.
Can anyone see a problem with this config?
NetIron CER 2024C-4X#show run
Current configuration:
!
ver V5.6.0gT183
!
no spanning-tree
!
vlan 1 name DEFAULT-VLAN
!
!
!
!
!
enable telnet password .....
enable super-user-password .....
telnet server
!
!
ip prefix-list VISPA-OUT seq 25 permit 1.2.3.0/24
!
ip prefix-list ALL-PREFIXES seq 5 permit 0.0.0.0/0 le 32
!
ip prefix-list DENY-ALL seq 5 deny 0.0.0.0/0 le 32
!
!
!
!
!
ip router-id 1.2.3.1
!
!
!
!
!
interface management 1
ip address 192.168.1.245/24
enable
!
interface ethernet 2/1
port-name *** Cogent ***
enable
ip address x.x.x.42/29
!
interface ethernet 2/4
enable
ip address 1.2.3.1/24
!
!
!
router bgp
local-as 29129
neighbor x.x.x.41 remote-as 174
neighbor x.x.x.41 description Cogent
address-family ipv4 unicast
synchronization
network 1.2.3.0/24
redistribute connected
neighbor x.x.x.41 route-map in COGENT-IN
neighbor x.x.x.41 route-map out COGENT-OUT
exit-address-family
address-family ipv4 multicast
exit-address-family
address-family ipv6 unicast
exit-address-family
address-family ipv6 multicast
exit-address-family
address-family vpnv4 unicast
exit-address-family
address-family vpnv6 unicast
exit-address-family
!
!
!
route-map COGENT-IN permit 20
match ip address prefix-list ALL-PREFIXES
set local-preference 300
!
route-map COGENT-OUT permit 10
match ip address prefix-list VISPA-OUT
route-map COGENT-OUT deny 20
match ip address prefix-list ALL-PREFIXES
!
!
!
!
!
!
!
end
BGP Sum :-
NetIron CER 2024C-4X#show run
NetIron CER 2024C-4X#show ip bgp sum
BGP4 Summary
Router ID: 1.2.3.1 Local AS Number: 123
Confederation Identifier: not configured
Confederation Peers:
Maximum Number of IP ECMP Paths Supported for Load Sharing: 1
Number of Neighbors Configured: 1, UP: 1
Number of Routes Installed: 2, Uses 172 bytes
Number of Routes Advertising to All Neighbors: 1 (1 entries), Uses 48 bytes
Number of Attribute Entries Installed: 2, Uses 180 bytes
Neighbor Address AS# State Time Rt:Accepted Filtered Sent ToSend
x.x.x.41 174 ESTAB 0h 7m 6s 0 0 1 0
I can ping Cogent's IP, x.x.x.41 fine.
I can't ping my router from the outside world. Cogent also can't ping me - x.x.x.42.
Make sure you have a default route.
ip route 0.0.0.0/0 x.x.x.x
where x.x.x.x is your cogent gateway.
I am trying to get a 2851 router setup using static routing and NAT. My college uses static routing, otherwise I wouldn't ;-)
I can ping addresses on the internet from the router console, but not from a machine on the inside network. I can ping the inside router port from a network client but not the outside port. I think I have all of the NAT stuff in there correctly, but still no routing. Can anyone else point out my mistake?
CSLabRouter#sho run
Building configuration...
Current configuration : 3621 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname CSLabRouter
!
boot-start-marker
boot-end-marker
!
logging buffered 51200 warnings
!
no aaa new-model
!
!
ip cef
!
!
no ip domain lookup
!
voice-card 0
no dspfarm
!
!
!
!
!
!
!
!
!
!
!
!
!
crypto pki trustpoint TP-self-signed-3695308060
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-3695308060
revocation-check none
rsakeypair TP-self-signed-3695308060
!
!
crypto pki certificate chain TP-self-signed-3695308060
certificate self-signed 01
3082023E 308201A7 A0030201 02020101 300D0609 2A864886 F70D0101 04050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 33363935 33303830 3630301E 170D3136 30393033 30333032
BC404C81 47004B31 4B3E456C 81E50FC7 E3C9F387 BBB7B8CD 98CC230C 4068B586 FC92
quit
username Admin privilege 15 password 0 MasterPass
!
!
!
!
!
interface GigabitEthernet0/0
ip address 172.30.30.1 255.255.0.0
ip nat enable
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 10.13.13.1 255.255.255.0
ip nat enable
duplex auto
speed auto
!
ip default-gateway 172.30.30.1
ip default-network 172.30.0.0
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 172.30.30.2
ip route 10.13.13.0 255.255.255.0 172.30.30.2
!
!
ip http server
ip http authentication local
ip http secure-server
ip nat pool AC008Clients 10.13.13.0 10.13.13.255 prefix-length 24 add-route
ip nat source list 1 pool AC008Clients overload
ip nat source static udp 10.13.13.8 53 interface GigabitEthernet0/0 53
ip nat source static tcp 10.13.13.8 53 interface GigabitEthernet0/0 53
ip nat source static udp 10.13.13.8 5900 interface GigabitEthernet0/0 5900
ip nat source static tcp 10.13.13.8 5900 interface GigabitEthernet0/0 5900
ip nat source static udp 10.13.13.8 3283 interface GigabitEthernet0/0 3283
ip nat source static tcp 10.13.13.8 3283 interface GigabitEthernet0/0 3283
ip nat source static udp 10.13.13.8 311 interface GigabitEthernet0/0 311
ip nat source static tcp 10.13.13.8 311 interface GigabitEthernet0/0 311
ip nat source static tcp 10.13.13.8 80 interface GigabitEthernet0/0 80
ip nat inside source list 1 interface GigabitEthernet0/0 overload
!
access-list 1 permit 10.13.13.0 0.0.0.255
snmp-server community CottonCandy RO
!
!
!
control-plane
!
!
!
!
!
!
!
!
alias exec s show ip int br
alias exec sr show run
!
line con 0
line aux 0
line vty 0 4
privilege level 15
login local
transport input ssh
!
scheduler allocate 20000 1000
!
end
I can see that you are using "ip nat enable" commend under the interfaces, and "ip nat inside source list 1 interface GigabitEthernet0/0 overload" in global config.
When we use the "ip nat enable command", we also need to slightly modify the nat statement in global config as well (to remove the word "inside" in global config).
Otherwise use "ip nat inside/outside" command.