Добрый день!
Не могу понять почему у меня разные MTU на интерфесах Tunell на маршрутизаторах.

Пинги через тунель идут через один!!!

Первый маршрутизатор

interface: Dialer0
    Crypto map tag: vpn, local addr. yyy.yyy.yyy.yyy

   protected vrf:
   local  ident (addr/mask/prot/port): (yyy.yyy.yyy.yyy/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (xxx.xxx.xxx.xxx/255.255.255.255/47/0)
   current_peer: xxx.xxx.xxx.xxx:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 19, #pkts encrypt: 19, #pkts digest 19
    #pkts decaps: 16, #pkts decrypt: 16, #pkts verify 16
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 1, #recv errors 0

     local crypto endpt.: yyy.yyy.yyy.yyy, remote crypto endpt.: xxx.xxx.xxx.xxx
     path mtu 1500, media mtu 1500
     current outbound spi: CD6CE629

     inbound esp sas:
      spi: 0x5254EC5A(1381297242)
        transform: esp-3des esp-sha-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: vpn
        sa timing: remaining key lifetime (k/sec): (4392980/3568)
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xCD6CE629(3446466089)
        transform: esp-3des esp-sha-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: vpn
        sa timing: remaining key lifetime (k/sec): (4392980/3568)
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:

interface: Virtual-Access2
    Crypto map tag: vpn, local addr. yyy.yyy.yyy.yyy

   protected vrf:
   local  ident (addr/mask/prot/port): (yyy.yyy.yyy.yyy/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (xxx.xxx.xxx.xxx/255.255.255.255/47/0)
   current_peer: xxx.xxx.xxx.xxx:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 19, #pkts encrypt: 19, #pkts digest 19
    #pkts decaps: 16, #pkts decrypt: 16, #pkts verify 16
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 1, #recv errors 0

     local crypto endpt.: yyy.yyy.yyy.yyy, remote crypto endpt.: xxx.xxx.xxx.xxx
     path mtu 1500, media mtu 1500
     current outbound spi: CD6CE629

     inbound esp sas:
      spi: 0x5254EC5A(1381297242)
        transform: esp-3des esp-sha-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: vpn
        sa timing: remaining key lifetime (k/sec): (4392980/3568)
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xCD6CE629(3446466089)
        transform: esp-3des esp-sha-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: vpn
        sa timing: remaining key lifetime (k/sec): (4392980/3566)
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:

interface: Tunnel0
    Crypto map tag: vpn, local addr. yyy.yyy.yyy.yyy

   protected vrf:
   local  ident (addr/mask/prot/port): (yyy.yyy.yyy.yyy/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (xxx.xxx.xxx.xxx/255.255.255.255/47/0)
   current_peer: xxx.xxx.xxx.xxx:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 19, #pkts encrypt: 19, #pkts digest 19
    #pkts decaps: 16, #pkts decrypt: 16, #pkts verify 16
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 1, #recv errors 0

     local crypto endpt.: yyy.yyy.yyy.yyy, remote crypto endpt.: xxx.xxx.xxx.xxx
     path mtu 1500, media mtu 1500
     current outbound spi: CD6CE629

     inbound esp sas:
      spi: 0x5254EC5A(1381297242)
        transform: esp-3des esp-sha-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: vpn
        sa timing: remaining key lifetime (k/sec): (4392980/3562)
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xCD6CE629(3446466089)
        transform: esp-3des esp-sha-hmac ,
        in use settings ={Transport, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: vpn
        sa timing: remaining key lifetime (k/sec): (4392980/3562)
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:

Второй:

interface: Dialer0
    Crypto map tag: vpn, local addr. xxx.xxx.xxx.xxx

   protected vrf:
   local  ident (addr/mask/prot/port): (xxx.xxx.xxx.xxx/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (yyy.yyy.yyy.yyy/255.255.255.255/47/0)
   current_peer: yyy.yyy.yyy.yyy:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0
    #pkts decaps: 0, #pkts decrypt: 0, #pkts verify: 0
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 0, #recv errors 0

     local crypto endpt.: xxx.xxx.xxx.xxx, remote crypto endpt.: yyy.yyy.yyy.yyy
     path mtu 1476, media mtu 1476
     current outbound spi: 0

     inbound esp sas:

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:

     outbound ah sas:

     outbound pcp sas:

interface: Tunnel0
    Crypto map tag: vpn, local addr. xxx.xxx.xxx.xxx

   protected vrf:
   local  ident (addr/mask/prot/port): (xxx.xxx.xxx.xxx/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (yyy.yyy.yyy.yyy/255.255.255.255/47/0)
   current_peer: yyy.yyy.yyy.yyy:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0
    #pkts decaps: 0, #pkts decrypt: 0, #pkts verify: 0
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 0, #recv errors 0

     local crypto endpt.: xxx.xxx.xxx.xxx, remote crypto endpt.: yyy.yyy.yyy.yyy
     path mtu 1476, media mtu 1476
     current outbound spi: 0

     inbound esp sas:

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:

     outbound ah sas:

     outbound pcp sas:

interface: Virtual-Access3
    Crypto map tag: vpn, local addr. xxx.xxx.xxx.xxx

   protected vrf:
   local  ident (addr/mask/prot/port): (xxx.xxx.xxx.xxx/255.255.255.255/47/0)
   remote ident (addr/mask/prot/port): (yyy.yyy.yyy.yyy/255.255.255.255/47/0)
   current_peer: yyy.yyy.yyy.yyy:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0
    #pkts decaps: 0, #pkts decrypt: 0, #pkts verify: 0
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 0, #recv errors 0

     local crypto endpt.: xxx.xxx.xxx.xxx, remote crypto endpt.: yyy.yyy.yyy.yyy
     path mtu 1476, media mtu 1476
     current outbound spi: 0

     inbound esp sas:

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:

     outbound ah sas:

     outbound pcp sas:

• Разные MTU на интерфейсе , Kan, 08:41 , 16-Авг-05, (1)