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Solved
Cisco Routing / Question on LACP
Posted on 2016-08-24
Hello Experts,
Can someone please take a look at my the configuration on my DLSW's 4 & 5 and let me know why DLSW-5 can't ping 172.16.1.1 or DLSW-4, can't ping 172.16.1.2
The interfaces are up and channeling is working fine, see below:
dlsw-4#show ip int brie
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 unassigned YES manual up up
Ethernet0/1 unassigned YES manual up up
Ethernet0/2 unassigned YES unset up up
Ethernet0/3 unassigned YES unset administratively down down
Ethernet1/0 unassigned YES unset administratively down down
Ethernet1/1 unassigned YES unset administratively down down
Ethernet1/2 unassigned YES unset administratively down down
Ethernet1/3 unassigned YES unset administratively down down
Port-channel1 172.16.1.1 YES manual up up
Vlan1 unassigned YES unset administratively down down
Vlan100 100.1.1.1 YES manual up up
dlsw-5#show ip int brie
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 unassigned YES manual up up
Ethernet0/1 unassigned YES manual up up
Ethernet0/2 unassigned YES unset up up
Ethernet0/3 unassigned YES unset administratively down down
Ethernet1/0 unassigned YES unset administratively down down
Ethernet1/1 unassigned YES unset administratively down down
Ethernet1/2 unassigned YES unset administratively down down
Ethernet1/3 unassigned YES unset administratively down down
Port-channel1 172.16.1.2 YES manual up up
Vlan1 unassigned YES unset administratively down down
Vlan200 200.1.1.1 YES manual up up
Group Port-channel Protocol Ports
------+-------------+-----
1 Po1(RU) LACP Et0/0(P) Et0/1(P)
The configurations are attached.
Regards
14-38-05--DLSW-4-64.187.124.3-.txt
14-38-13--DLSW-5-64.187.124.3-.txt
Can someone please take a look at my the configuration on my DLSW's 4 & 5 and let me know why DLSW-5 can't ping 172.16.1.1 or DLSW-4, can't ping 172.16.1.2
The interfaces are up and channeling is working fine, see below:
dlsw-4#show ip int brie
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 unassigned YES manual up up
Ethernet0/1 unassigned YES manual up up
Ethernet0/2 unassigned YES unset up up
Ethernet0/3 unassigned YES unset administratively down down
Ethernet1/0 unassigned YES unset administratively down down
Ethernet1/1 unassigned YES unset administratively down down
Ethernet1/2 unassigned YES unset administratively down down
Ethernet1/3 unassigned YES unset administratively down down
Port-channel1 172.16.1.1 YES manual up up
Vlan1 unassigned YES unset administratively down down
Vlan100 100.1.1.1 YES manual up up
dlsw-5#show ip int brie
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 unassigned YES manual up up
Ethernet0/1 unassigned YES manual up up
Ethernet0/2 unassigned YES unset up up
Ethernet0/3 unassigned YES unset administratively down down
Ethernet1/0 unassigned YES unset administratively down down
Ethernet1/1 unassigned YES unset administratively down down
Ethernet1/2 unassigned YES unset administratively down down
Ethernet1/3 unassigned YES unset administratively down down
Port-channel1 172.16.1.2 YES manual up up
Vlan1 unassigned YES unset administratively down down
Vlan200 200.1.1.1 YES manual up up
Group Port-channel Protocol Ports
------+-------------+-----
1 Po1(RU) LACP Et0/0(P) Et0/1(P)
The configurations are attached.
Regards
14-38-05--DLSW-4-64.187.124.3-.txt
14-38-13--DLSW-5-64.187.124.3-.txt
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14 Comments
Active today
Most likely source interface for ping is VLAN 100, try extended ping
ping and then press enter
then select source interface po1 for ping
if you turn on routing on both devices you don't need source interface since interface closest to destination will be used for pings
ping and then press enter
then select source interface po1 for ping
if you turn on routing on both devices you don't need source interface since interface closest to destination will be used for pings
Active today
LVL,
Thanks for responding,
I have configured the following on both routers
ip routing
ip cef
router eigrp 1
network 0.0.0.0 255.255.255.255
no auto-summary
Now I'm getting the following errors:
*Aug 24 08:59:21.657: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: retry limit exceeded
dlsw-4#ping
*Aug 24 08:59:25.119: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is up: new adjacency
dlsw-4#ping
*Aug 24 09:00:44.711: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: Interface PEER-TERMINATION received
dlsw-4#ping
*Aug 24 09:00:48.170: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is up: new adjacency
dlsw-4#ping
*Aug 24 09:02:07.743: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: Interface PEER-TERMINATION received
*Aug 24 09:02:08.045: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is up: new adjacency
dlsw-4#ping
*Aug 24 09:03:27.624: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: retry limit exceeded
Thanks for responding,
I have configured the following on both routers
ip routing
ip cef
router eigrp 1
network 0.0.0.0 255.255.255.255
no auto-summary
Now I'm getting the following errors:
*Aug 24 08:59:21.657: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: retry limit exceeded
dlsw-4#ping
*Aug 24 08:59:25.119: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is up: new adjacency
dlsw-4#ping
*Aug 24 09:00:44.711: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: Interface PEER-TERMINATION received
dlsw-4#ping
*Aug 24 09:00:48.170: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is up: new adjacency
dlsw-4#ping
*Aug 24 09:02:07.743: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: Interface PEER-TERMINATION received
*Aug 24 09:02:08.045: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is up: new adjacency
dlsw-4#ping
*Aug 24 09:03:27.624: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Port-channel1) is down: retry limit exceeded
Active today
There is no need to configure dynamic routing for ping.
# ip routing
is enough.
Since neighbor is flapping in EIGRP looks like your etherchannel is not stable.
Is that GNS3, packet tracer, or real switches? In the case of GNS3 it could be some bug, for packet tracer - occasionally it deletes configuration from the interface that is assigned to etherchannel :) .
# ip routing
is enough.
Since neighbor is flapping in EIGRP looks like your etherchannel is not stable.
Is that GNS3, packet tracer, or real switches? In the case of GNS3 it could be some bug, for packet tracer - occasionally it deletes configuration from the interface that is assigned to etherchannel :) .
Active today
The thing is, if you configured properly etherchannel - through Po1 interface everything should work, and most likely it is working (since router was occasionally able to establish neighbor relationship between EIGRP neighbors through etherchannel - that mean two way communication). Looks like traffic between devices is burst by nature for some reason, packets are coming and then stop, and then all over again. Not sure what can be done about it, but if both router "see" that LACP is properly working - communication between routers work properly (EIGRP establishes neighbor relations), but it is unstable for some reason.
Active today
Try with IOU version i86bi-linux-l2-adventerpri
Also, try with a static Etherchannel to rule out a LACP bug.
Also, try with a static Etherchannel to rule out a LACP bug.
Active 2 days ago
I guess it's possible, but why would you assign your port-channel an IP?
Also, what traffic are you trying to allow over this port-channel? Default VLAN1?
The only other VLAN I see configured is VLAN200 on DLSW-5 and VLAN100 on DLSW-4.
What exactly are you trying to allow through this port-channel?
The typical configuration I would see on a port-channel is something like this (assuming the VLAN you wanted to traverse the port-channel was VLAN10):
DLSW-5
interface Port-channel1
switchport trunk allowed vlan 10
switchport mode trunk
!
interface Ethernet0/0
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
!
interface Ethernet0/1
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
DLSW-4
interface Port-channel1
switchport trunk allowed vlan 10
switchport mode trunk
!
interface Ethernet0/0
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
!
interface Ethernet0/1
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
MO
Also, what traffic are you trying to allow over this port-channel? Default VLAN1?
The only other VLAN I see configured is VLAN200 on DLSW-5 and VLAN100 on DLSW-4.
What exactly are you trying to allow through this port-channel?
The typical configuration I would see on a port-channel is something like this (assuming the VLAN you wanted to traverse the port-channel was VLAN10):
DLSW-5
interface Port-channel1
switchport trunk allowed vlan 10
switchport mode trunk
!
interface Ethernet0/0
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
!
interface Ethernet0/1
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
DLSW-4
interface Port-channel1
switchport trunk allowed vlan 10
switchport mode trunk
!
interface Ethernet0/0
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
!
interface Ethernet0/1
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 1 mode active
MO
Active today
@Michael - L3 Port-channel is common. It is used where you want to allow multiple links to be aggregated but don't want to use a VLAN and SVI. Your config above doesn't include any L3 configuration.
Active today
Craig, this was the correct solution. Michael, the reason for this type of setup was because I was following a lab
Active 2 days ago
@Craig Beck
Sorry, I didn't mean to indicate that it was uncommon, period. I meant that it wasn't common to see it in a layer 2 application and I simply assumed that's all we were talking about since there weren't any other details in the attached configs to suggest otherwise. That's precisely why I was asking about "what" traffic needed to traverse the etherchannel/port-channel.
I saw the comment about EIGRP being added to the mix, but I wasn't sure how that fit into the whole picture, which it didn't appear that it did.
MO
Sorry, I didn't mean to indicate that it was uncommon, period. I meant that it wasn't common to see it in a layer 2 application and I simply assumed that's all we were talking about since there weren't any other details in the attached configs to suggest otherwise. That's precisely why I was asking about "what" traffic needed to traverse the etherchannel/port-channel.
I saw the comment about EIGRP being added to the mix, but I wasn't sure how that fit into the whole picture, which it didn't appear that it did.
MO
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