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Enthusiast

EIGRP - ASA - DMZ Interface

Hello - I am trying to configure EIGRP on my ASA DMZ Interface - topology as follows:

Inside                        DMZ

3560x ------ ASA ------- 3560x

e0/1                          e0/3.501

The ASA is currently configured for EIGRP with the inside 3560x switch and passing routing updates properly.

However, the ASA will not send/receive routing updates to/from the DMZ 3560x switch - the two devices do establish eigrp neighbor relationship.

Any suggestions would be appreciated.

Thanks.

Josh

ASA Configuration:

!

router eigrp 600

no auto-summary

eigrp router-id 10.100.0.1

network 10.50.10.0 255.255.255.0

network NET-TOWER-TRANSIT-FW-10.100.0.0-24 255.255.255.0

passive-interface default

no passive-interface FW_TRANSIT

no passive-interface DMZ_TEST

redistribute static route-map EIGRP_REDISTRIBUTION_RMAP

!

interface Ethernet0/1

description Internal Tower Networks

nameif FW_TRANSIT

security-level 100

ip address 10.100.0.1 255.255.255.0

!

interface Ethernet0/3

description DMZ physical interface

nameif DMZ_PHYSICAL

security-level 50

no ip address

!

interface Ethernet0/3.510

vlan 510

nameif DMZ_TEST

security-level 50

ip address 10.50.10.254 255.255.255.0

!

DMZ Switch Configuration:

!

router eigrp 600

network 10.50.10.0 0.0.0.255

network 10.50.11.0 0.0.0.255

passive-interface default

no passive-interface Vlan75

no passive-interface Vlan510

eigrp router-id 10.50.255.254

!

interface Vlan510

ip address 10.50.10.1 255.255.255.0

!

Everyone's tags (6)
4 REPLIES 4
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Cisco Employee

EIGRP - ASA - DMZ Interface

Can you try adding "no auto-summary" in DMZ switch, to see if that resolves.

I'm not sure with ASA/firewalls. Hence not sure if I'm missing something on ASA side.

Highlighted
Enthusiast

EIGRP - ASA - DMZ Interface

Hi Sudeep - thanks for the suggestion - no auto-summary is default on the version of IOS that I am running.

Highlighted
Enthusiast

Re: EIGRP - ASA - DMZ Interface

Some additional information - the neighbor relationship is flapping - it looks like the initial relationship is established but then each device is unable to pass on any update packets - below shows the Queue Count is non-zero.

on the ASA:

TOWER-FW01# sh eigrp ne

EIGRP-IPv4 neighbors for process 600

H     Address          Interface     Hold      Uptime     SRTT     RTO     Q     Seq

                                              (sec)                     (ms)                 Cnt   Num

1     10.50.10.1       Et0/3.510   11         00:01:14      1        5000    2      11184

0     10.100.0.253    Et0/1         11         9w0d           4       200      0       8357

on the 3560x:

TOWER-DMZ-01#sh ip eigrp ne

EIGRP-IPv4 Neighbors for AS(600)

H     Address          Interface     Hold     Uptime     SRTT     RTO     Q     Seq

                                              (sec)                    (ms)                 Cnt   Num

0     10.50.10.254    Vl510          14      00:00:18       1       5000     1      0

The ASA is also logging the following error:

Routing failed to locate next hop fro EIGRP from identity:10.50.10.254/0 to FW_TRANSIT:10.50.10.1/0

Another clue - when trying to ping from ASA to 3560x i receive the following:

TOWER-FW01# ping 10.50.10.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.50.10.1, timeout is 2 seconds:

?????

Success rate is 0 percent (0/5)

I am able to ping from the 3560x to the ASA - I don't know why I cannot ping in the other direction

Highlighted
Enthusiast

Re: EIGRP - ASA - DMZ Interface

Issue is resolved in another post -

https://supportforums.cisco.com/message/3703561#3703561

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