08-16-2012 06:43 AM - edited 03-07-2019 08:22 AM
In the existing network we have Cisco 2811 router connected to Corporate MPLS cloud. Cisco 2811 is connected to Catalyst 6509 switch(set based IOS with MSFC card). Along with that we have two Catalyst 5509. We are upgrading the access layer by replacing catalyst switches with Nexus 5548 & 2248.
For a purpose of testing I have connected 5548 & 2248. Created cPC and ether channels between two. SVI and HSRP configuredon 5548. I am terminating 2651 (test router) on 2248 port 101/1/1. On 5548 I have enabled EIGRP on vlans. I am unable to ping to 2651 from nexus switch 5548 and vice-versa.
I can see both devices on CDP but I do not see eigrp neighborship formed.
What configuration should go in 2248 and 2651 in order to establish a connection between two? If test is successful then I will connect 2811 to 2248 during actual migration. I assume that in testing if it works for 2651 then it must work on 2811 router.
Solved! Go to Solution.
08-22-2012 07:16 AM
Your topology will not work. When you connect the 2811 to the FEX, that FEX needs to be single homed, not vPC to the N5K.
To prune the 2811 VLAN from the vPC peer-link, you can use
switchport trunk allowed vlan remove 24
HTH,
jerry
08-23-2012 02:42 PM
Jerry,
The FEX on which I am connecting Cisco 2811 router has to be single homed or it can be multi homed ?
Thanks
Ashok
08-23-2012 03:38 PM
Jerry,
I was reading below Cisco document on vPC
One of the solution for suboptimal route is use command peer-gateway starting from Release 5.0(3)N1(1b),
I have this OS n5000-uk9.5.1.3.N2.1a.bin on my N5K.
Let me know your view on above command.
Thanks
Ashok
08-23-2012 07:52 PM
The FEX to your C2811 should be single homed.
Peer-gateway is used to solve certain problem. It is generally recommended for vPC set up involved inter-VLAN routing.
HTH,
jerry
08-24-2012 03:34 PM
Jerry,
As per our discussion till now I have setup network as below:
Is it OK to configured VPC between N5K and N2K that is single homed?
What is the good practice to configure Catalyst 4510 to both N5K?
08-24-2012 03:40 PM
I think your L3 toward 2811 is fine.
What is your connection to the C4510? L2 or L3? If it is L2, you can do vPC. If it is L3, you should do ECMP.
HTH,
jerry
08-24-2012 03:47 PM
Jerry,
It is L2. so I will configure vPC between N5K and 4510.
Tomorrow I am setting up N5K, N2K & 4510 in test environment. Once I am done I will send you final diagram and config.
Thanks for help till now.
Thanks
Ashok
08-25-2012 07:14 PM
Jerry,
Today did configured Nexus as per our discussion.
1) Under port channel 1 (N5k to N5K) I did not find command peer-gateway.
2) I connected test router to N2K (single homed). Port is showig inactive.
08-25-2012 07:23 PM
You got your HWIC-1GE-SFP and GLC-T already???
And you've connected the 2K to the GLC-T?
08-25-2012 10:03 PM
Leolaohoo,
Earlier I was researching on which interface is suitable for connection between N5K & Cisco 2811. We are not buying the card at this moment instead I am connecting Cisco 2811 directly to N2K. As per suggesion from support.cisco.com I re-wired the switches. Below is the present set-up.
Cisco 2651 (vlan 24) === N2K(single homed) (vPC) === N5K -1 ------- (trunk, allowed vlan 24) ------- N5K
| | | \==================vPC (Po1)====/ | | |
| | | | | |
| | \------------------N2K (dual homed)----------------/ | |
| | | |
| \--------------------N2K (dual homed)-----------------/ |
| |
\----------------------N2K (dual homed)------------------/
I have connected test router to N2K. Interface at N2K is showing inactive.
[I accidentely clicked on answered button.:( ]
08-25-2012 11:59 PM
And what model is you N2K?
08-26-2012 08:14 AM
Hi Leo,
I think he has 2248TP. This has support of 100MB.
Hi Ashok,
1. peer-gateway command is not under port-channel. It is a vPC global configuration, you need to put this under vpc domain x.
2. Can you show me the FEX fabric configuration along with the port-channel? Also need the FEX HIF configuration.
Regards,
jerry
08-26-2012 12:27 PM
Jerry,
interface port-channel101
switchport mode fex-fabric
fex associate 101
vpc 101
interface Ethernet1/1
switchport mode fex-fabric
fex associate 101
channel-group 101
interface Ethernet1/2
switchport mode fex-fabric
fex associate 101
channel-group 101
interface port-channel1
switchport mode trunk
switchport trunk allowed vlan 1,25-29,31,129,137,146
spanning-tree port type network
speed 10000
vpc peer-link
interface Ethernet1/9
switchport mode trunk
switchport trunk allowed vlan 1,25-29,31,129,137,146
channel-group 1 mode active
interface Ethernet1/10
switchport mode trunk
switchport trunk allowed vlan 1,25-29,31,129,137,146
channel-group 1 mode active
interface Ethernet1/11
switchport mode trunk
switchport trunk allowed vlan 24
On N5K-1
interface mgmt0
ip address 172.16.154.1/24
vpc domain 1
role priority 1000
peer-keepalive destination 172.16.154.2
peer-gateway
On N5K-2
interface mgmt0
ip address 172.16.154.2/24
vpc domain 1
role priority 2000
peer-keepalive destination 172.16.154.1
peer-gateway
I did not understood HIF command. Please explain.
08-26-2012 02:08 PM
HIF - host interface, meanning E101/1/x on the FEX.
Please provide show interface e101/1/x, show vlan id 24, and show run int vlan 24.
Regards,
jerry
08-26-2012 03:24 PM
Jerry,
LSV-CORE-SW01# sh run int e101/1/1
!Command: show running-config interface Ethernet101/1/1
!Time: Thu Jan 24 07:42:19 1957
version 5.1(3)N2(1a)
interface Ethernet101/1/1
switchport access vlan 24
LSV-CORE-SW01# sh int e101/1/1
Ethernet101/1/1 is down (inactive)
Hardware: 100/1000 Ethernet, address: 0cd9.9608.b442 (bia 0cd9.9608.b442)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is access
auto-duplex, 100 Mb/s
Beacon is turned off
Input flow-control is off, output flow-control is on
Switchport monitor is off
EtherType is 0x8100
Last link flapped 00:22:48
Last clearing of "show interface" counters never
30 seconds input rate 176 bits/sec, 0 packets/sec
30 seconds output rate 72 bits/sec, 0 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 232 bps, 0 pps; output rate 112 bps, 0 pps
RX
1387 unicast packets 3242 multicast packets 23 broadcast packets
4652 input packets 420655 bytes
0 jumbo packets 0 storm suppression bytes
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
0 unicast packets 748 multicast packets 0 broadcast packets
748 output packets 213261 bytes
0 jumbo packets
0 output errors 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
0 interface resets
LSV-CORE-SW01#
LSV-CORE-SW01# sh vlan id 24
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
24 VLAN0024 active Eth1/11, Eth101/1/1, Eth101/1/2
VLAN Type Vlan-mode
---- ----- ----------
24 enet CE
Remote SPAN VLAN
----------------
Disabled
Primary Secondary Type Ports
------- --------- --------------- -------------------------------------------
LSV-CORE-SW01#
LSV-CORE-SW01# sh run int vlan 24
!Command: show running-config interface Vlan24
!Time: Thu Jan 24 07:44:14 1957
version 5.1(3)N2(1a)
interface Vlan24
no shutdown
no ip redirects
ip address 192.168.24.4/24
ip router eigrp 65102
hsrp 2
preempt
ip 192.168.24.1
ip dhcp relay address 192.168.24.2 (test DHCP configured in Cisco 2651 router)
LSV-CORE-SW01#
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