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New Member

Cannot ping IP addresses on ARP table

Hello I am having a strange problem and would be grateful to have some insights on it please.

 

sh ip arp vrf  INET

Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  172.26.23.1             -   0000.0cb8.a914  ARPA   BVI3
Internet  172.26.23.2            43   c08c.60c7.9064  ARPA   BVI3
Internet  172.26.23.6            10   8438.35eb.91fd  ARPA   BVI3
Internet  172.26.23.7             1   3c15.c210.af45  ARPA   BVI3
Internet  172.26.23.8             1   54ea.a82d.1fcd  ARPA   BVI3
Internet  172.26.23.9             1   786c.1ce5.3056  ARPA   BVI3
Internet  172.26.23.10            2   f0d1.a9ef.0ad0  ARPA   BVI3
Internet  172.26.23.12            0   0870.4529.21a1  ARPA   BVI3
Internet  172.26.23.13            0   b817.c20e.f38a  ARPA   BVI3
Internet  172.26.23.14            0   8c29.3710.d6ea  ARPA   BVI3
Internet  172.26.23.15           14   10a5.d0db.770e  ARPA   BVI3
Internet  172.26.23.16           13   e063.e585.52bb  ARPA   BVI3
Internet  172.26.23.17            9   e063.e5e4.c28b  ARPA   BVI3
Internet  172.26.23.19            0   380f.4a60.3e9e  ARPA   BVI3
Internet  172.26.23.20            1   446d.5768.654b  ARPA   BVI3
Internet  172.26.23.21           11   d422.3f51.a51b  ARPA   BVI3
Internet  172.26.23.22            0   54ea.a845.564d  ARPA   BVI3
Internet  172.26.23.23            0   4cb1.994f.f3d8  ARPA   BVI3
Internet  172.26.23.24           13   60c5.478a.2778  ARPA   BVI3
Internet  172.26.23.25           32   cc3a.6159.6c4f  ARPA   BVI3
Internet  172.26.23.27           15   b8e8.56e6.4217  ARPA   BVI3
Internet  172.26.23.30            1   f0d1.a91e.9863  ARPA   BVI3
Internet  172.26.23.31            3   d8d1.cbd7.92d1  ARPA   BVI3
Internet  172.26.23.33            0   843a.4b22.059e  ARPA   BVI3
Internet  172.26.23.34            0   843a.4b8a.d728  ARPA   BVI3
Internet  172.26.23.35            0   cc78.5fcc.f310  ARPA   BVI3
Internet  172.26.23.36            0   e88d.28be.5c0e  ARPA   BVI3
Internet  172.26.23.37            0   f0c1.f163.65b1  ARPA   BVI3
Internet  172.26.23.38            2   acfd.ec01.b021  ARPA   BVI3
Internet  172.26.23.40            0   c86f.1ddd.8839  ARPA   BVI3
Internet  172.26.23.41            0   b418.d168.e7f9  ARPA   BVI3
Internet  172.26.23.42           29   0808.c219.38e7  ARPA   BVI3
Internet  172.26.23.43            0   b418.d177.17bb  ARPA   BVI3
Internet  172.26.23.44            0   f437.b740.2b48  ARPA   BVI3
Internet  172.26.23.45            0   bc3b.af68.f990  ARPA   BVI3
Internet  172.26.23.47           24   3ca9.f41f.7f5c  ARPA   BVI3
Internet  172.26.23.48            0   3ca9.f41f.7f5c  ARPA   BVI3
Internet  172.26.23.49            0   c485.08dd.f329  ARPA   BVI3
Internet  172.26.23.50           23   48d2.2424.6e2f  ARPA   BVI3
Internet  172.26.23.51            2   b4f0.ab3f.3ea2  ARPA   BVI3
Internet  172.26.23.53           12   980c.8258.1230  ARPA   BVI3
Internet  172.26.23.55            0   0415.523e.c11f  ARPA   BVI3
Internet  172.26.23.56            0   e88d.2808.b480  ARPA   BVI3
Internet  172.26.23.57           14   c8aa.2170.76ac  ARPA   BVI3
Internet  172.26.23.58            0   e09d.3100.9dd4  ARPA   BVI3
Internet  172.26.23.60            8   cc3a.610e.72a1  ARPA   BVI3
Internet  172.26.23.61            0   0811.9675.6074  ARPA   BVI3
Internet  172.26.23.62            5   20c9.d0df.90d3  ARPA   BVI3
Internet  172.26.23.83           29   b418.d177.17bb  ARPA   BVI3
Internet  172.26.23.84           30   f437.b740.2b48  ARPA   BVI3
Internet  172.26.23.88            0   90b1.1c88.a22c  ARPA   BVI3
Internet  172.26.23.89            0   843a.4b63.4b10  ARPA   BVI3
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  172.26.23.90           40   cc3a.6159.6c4f  ARPA   BVI3
Internet  172.26.23.93           43   380f.4a60.3e9e  ARPA   BVI3
Internet  172.26.23.94           42   54ea.a845.564d  ARPA   BVI3
Internet  172.26.23.95           42   d422.3f51.a51b  ARPA   BVI3
Internet  172.26.23.96           38   f0d1.a91e.9863  ARPA   BVI3
Internet  172.26.23.98           43   cc78.5fcc.f310  ARPA   BVI3
Internet  172.26.23.99           27   5c51.4fb1.5625  ARPA   BVI3
Internet  172.26.23.102          43   d8d1.cbd7.92d1  ARPA   BVI3
Internet  172.26.23.103          43   e88d.28be.5c0e  ARPA   BVI3
Internet  172.26.23.105          42   b418.d168.e7f9  ARPA   BVI3
Internet  172.26.23.106          41   f0c1.f163.65b1  ARPA   BVI3
Internet  172.26.23.107          41   bc3b.af68.f990  ARPA   BVI3
Internet  172.26.23.108          41   b4f0.ab3f.3ea2  ARPA   BVI3
Internet  172.26.23.109          41   acfd.ec01.b021  ARPA   BVI3
Internet  172.26.23.110          35   e88d.2808.b480  ARPA   BVI3
Internet  172.26.23.115          31   c86f.1ddd.8839  ARPA   BVI3
Internet  172.26.23.116          41   4cb1.994f.f3d8  ARPA   BVI3
Internet  172.26.23.118          27   0415.523e.c11f  ARPA   BVI3
Internet  172.26.23.122           9   6477.9145.3a5a  ARPA   BVI3
Internet  172.26.23.123          25   3019.6684.8f48  ARPA   BVI3
Internet  172.26.23.124           0   1040.f3b3.a61c  ARPA   BVI3
Internet  172.26.23.125          16   784b.8788.9f0f  ARPA   BVI3
 

 

interface BVI3
 
 ip vrf forwarding INET
 ip address 172.26.23.1 255.255.255.128
 ip flow ingress
 ip tcp adjust-mss 1400
end
 

 

interface GigabitEthernet0/0.3
 encapsulation dot1Q 800
 ip vrf forwarding INET
 ip tcp adjust-mss 1400
 bridge-group 3
 bridge-group 3 input-address-list 703
end

But when I ping the devices some devices which are working fine like the one with .88 IP address I cannot ping it.

the access list has the .88 ip address MAC already added

Internet  172.26.23.88            0   90b1.1c88.a22c  ARPA   BVI3

access-list 703 permit 90b1.1c88.a22c   0000.0000.0000
access-list 703 permit ffff.ffff.ffff   0000.0000.0000
access-list 703 deny   0000.0000.0000   ffff.ffff.ffff

 

ping vrf INET 172.26.23.88

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.26.23.88, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

 

 

 

 

 

3 REPLIES
New Member

What happens when you ping

What happens when you ping the address with the source command using an interface in the same vrf?

New Member

This is what i see  ping vrf

This is what i see

 

 ping vrf INET 172.26.23.88 so bvi3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.26.23.88, timeout is 2 seconds:
Packet sent with a source address of 172.26.23.1
.....
Success rate is 0 percent (0/5)

 

Some of them randomly pings!!

ping vrf INET 172.26.23.42

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.26.23.42, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/21/88 ms

 

 

 

Silver

Could it be that some of the

Could it be that some of the devices are PCs / servers that are running host based firewalls that block ICMP? 

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